Oliver, C. J.-
Plaintiff Kansas City Power and Light Company owned and plaintiff Peoples Gas & Electric Company operated a powerhouse and electric generating plant at Mason City, with connected lines furnishing electricity in said city and to several adjacent industrial plants, and to an electric railway, and in or to thirteen neighboring towns; also about six hundred twenty-five miles of rural lines serving about sixteen hundred rural customers in five counties in northern Iowa. They also owned and operated a gas system furnishing natural gas in six of said cities and towns and certain suburban districts.
Defendant Commission levied tbe two per cent use tax upon numerous items of industrial materials and equipment purchased by plaintiffs outside of Iowa and used in said utilities between April 1937 and April 1941. Plaintiffs appealed to the district court, which reversed the assessment upon many items and affirmed upon others. The Commission has appealed to this court from the part of the decree which reversed the assessment upon most of the items. Plaintiffs have not appealed from the affirmance upon the other items.
I. The use-tax law is supplementary to the sales-tax law. It indirectly taxes sales by taxing use. It serves not only to produce revenue but also to protect Iowa dealers by placing them on a tax equality with out-of-state vendors whose sales are not subject to a two per cent sales tax. Dain Mfg. Co. v. Iowa State Tax Comm., 237 Iowa 531, 22 N. W. 2d 786; State Tax Comm. v. General Trading Co., 233 Iowa 877, 10 N. W. 2d 659, 153 A. L. R. 602. In the language of Nelson v. Sears, Roebuck & Co., 312 U. S. 359, 363, 61 S. Ct. 586, 588, 85 L. Ed. 888, 132 A. L. R. 475:
“It is one of the well-known functions of the integrated use and sales tax to remove the buyers’ temptation ‘to place their orders in other states in the effort to escape payment of the tax on local sales. ’ ’ ’
This out-of-state buying to escape the sales tax was harmful to Iowa sellers and to the sales tax. The principal purpose of the enactment of the use-tax law was to remedy this evil. Protection of the Iowa seller is in fact protection of the sales tax. If he is forced out of business or deprived of part of his business by the imposition of a tax that does not reach his out-of-state competitors, the revenue is lost to the state of Iowa.
Of course, the Iowa user or consumer may purchase outside the state if he so desires. The use tax is not a penalty upon such purchases. It does not even place them at a tax disadvantage. It merely makes them subject to an equal tax.
The two acts are designed to reach all retail sales to Iowa consumers or users (with certain specified exceptions) with a tax measured by two per cent of the sale price. The tax is
paid by the consumer or user but the retailers are made the collectors of the tax under the sales-tax act, and, insofar as possible, under the use-tax act.
II. The use-tax law, enacted in 1937, is now chapter 423, Code of Iowa, 1946. Code section 423.2 provides in part:
“An excise tax is hereby imposed on the use in this state of tangible personal property purchased * * * for use in this state, at the rate of two percent of the purchase price.”
This language is broad and unlimited. It comprehends all tangible personal property purchased at any place for use in Iowa. However, the, scope of the section .is restricted by exemptions and exceptions in various other sections of the chapter. Section 423.1, entitled “Definitions,” states that:
“1. ‘Use’ means and includes the exercise * * * of any right * * * over tangible personal property incident to the ownership * * * except that it shall not include processing * * * Property used in ‘processing’ * * * shall mean and include
*
* * (c) industrial materials and equipment, which are not readily obtainable in Iowa, and which are directly used in the actual fabricating, compounding, manufacturing, or servicing of tangible personal property intended to be sold ultimately at retail.”
Plaintiffs contend that, by virtue of the foregoing provision, the materials and equipment in question were property not subject to use tax. They assert the expression, “except that it [use] shall not include processing,” is a want of coverage of property so used, rather than an exemption from coverage, and that the above-quoted parts of “Definitions,’-’ section 423.1, should be strictly construed against the tax. Our decisions involving the construction of other statutes, comparable in form, do not support this conclusion.
The 1937 sales-tax act changed the “Definitions” section of the 1934 act by adding a processing exception (similar to parts of section 423.1) and by adding also,
“*
* * but does not include commercial fertilizer *
*
Section 422.42(3), Code, 1946. Kennedy v. State Board of Assessment and Re
view, 224 Iowa 405, 409, 276 N. W. 205, 207, points ont that tbis exempted commercial fertilizer, not theretofore exempted, and states: “Taxation is tbe rule, not the exception.”
Eddington v. Northwestern Bell Tel. Co., 201 Iowa 67, 72, 202 N. W. 374, 377, states the polestar of construction of any statute is “* * * that the
rule
is broader than the
exception;
that the exception is specific, rather than general; and that, therefore, doubts and implications should be solved in favor of the rule; rather than of the exception.”
Garrison v. Gortler, 234 Iowa 541, 548, 13 N. W. 2d 358, 361, and Heiliger v. City of Sheldon, 236 Iowa 146, 153, 154, 18 N. W. 2d 182, 187; involve the construction of parts of a £(i Definitions” section of the Workmen’s Compensation Law. That section, Code, 1946, section 85.61(2), (3), defines workman or employee, “*
* *
except as hereinafter specified,” and then specifies, “The following persons shall not be deemed ‘workmen’ or ‘employees’.” Both 'decisions refer to this as a statutory exception which should be strictly construed so as not to encroach unduly upon the general statutory provision to which it is an exception.
In Wood Bros. Thresher Co. v. Eicher, 231 Iowa 550, 562, 1 N. W. 2d 655, exceptions to the general statute were likewise strictly construed.
Chapter 437, Code of 1946, deals with the assessment of electric transmission lines. Section 437.1, entitled, “ ‘Company’ defined,” states it includes any association, corporation, etc. (except co-operative associations, etc.). This exception provision was considered in Greene County Rural Elec. Co-Op. v. Nelson, 234 Iowa 362, 365, 366, 12 N. W. 2d 886, which states it is familiar doctrine that the section must be strictly construed in favor of the taxing body and against those claiming exemption from taxation.
The rule of strict construction against exemptions was applied in Hale v. State Board of Assessment and Review, 223 Iowa 321, 271 N. W. 168, affirmed 302 U. S. 95, 58 S. Ct. 102, 82 L. Ed. 72, in which the taxpayer claimed exemption from income tax of interest on municipal securities under statutes providing that such securities should not be taxed.
Plaintiffs rely in part upon a statement in Palmer v. State Board of Assessment and Review, 226 Iowa 92, 93, 283 N. W. 415, 416, that, if subject to construction, a certain section (6943-Í8, Code of 1935,
“
'Gross Income’ defined — exceptions”) should be construed strictly against the taxing body. The reference in that statement to the (entire) section was inadvertent and the statement should have been expressly limited to subsection 1 of said section, theretofore quoted, which defines gross income by listing the items included in the term. Subsection 2, which exempts a list of items not included in the term “gross income,” was not set out at length and was not under consideration at that point in the Palmer case, and the statement was not intended to refer to it nor to subsequent subsections. As thus clarified the statement in the Palmer case is not contrary to the doctrines of the other cited decisions.
In the case at bar the general provision (section 423.2, Code of 1946) imposes the tax upon the use of all tangible personal property purchased for use in Iowa, and the language in section 423.1 here in question excepts or exempts some materials and equipment made subject to the tax by such general statutory provision. Hence, where construction is proper and necessary, such language in section 423.1 should be strictly construed against the taxpayer.
III. The administrative division of the income, corporation, and sales-tax law is made a part of the use-tax law by section 423.23, Code of 1946. Both laws are administered by Iowa State Tax Commission.
In October 1937, shortly after the act took effect, the Tax Commission adopted certain interpretations of the use-tax act referred to in Dain Mfg. Co. v. Iowa State Tax Comm., supra, 237 Iowa 531, 22 N.
W.
2d 786. In March 1942 the Commission promulgated Rule 172, which in some respects conflicts with the 1937 interpretations. In the Dain case the record was made by stipulation and merely set out the 1937 interpretation and Rule 172. Under such record it was fair to conclude that the Commission had followed the early interpretations un- . til Rule 172 was adopted. The record in the case at bar is materially different. It shows the Commission had never fol
lowed and applied the 1937 interpretations and that at all times and in every ease to which it was applicable (with perhaps one exception) the nse-tax law had been administered by the Commission in accordance with Rule 172, which was later formally promulgated.
Rule 172 and more than one hundred printed pages of other rules and regulations for the sales and use taxes were prescribed by the Commission under the express authorization of Code section 422.61. Although stability in such rules and regulations is desirable, it does not follow that they may not be changed or corrected by the Commission. Where Commissions, are required to administer laws in new fields, such changes are not unusual.. See Boyer-Campbell Co. v. Fry, 271 Mich. 282, 260 N. W. 165, 98 A. L. R. 827. Moreover, it appears from the record that Rule 172 represents a recognition of regulations which previously had been generally followed, rather than a contemporaneous change in interpretation.
IY. Unless the materials and equipment purchased outside of Iowa and used by plaintiffs were within the exception of “processing”, as defined in section 423.1, the same were subject to the use tax. One essential element of this definition is the same be “not readily obtainable in Iowa.” The legislature did not enlarge upon the expression “not readily obtainable in Iowa.” It is fair to infer it deliberately refrained from so doing, concluding that the legislative intent could best be expressed by general language, the applicability of which to specific cases would depend upon their circumstances.
Indicative of this legislative purpose and plan is section 422.61 which empowers the State Tax Commission to prescribe all rules and regulations not inconsistent with the provisions of the chapter, necessary and advisable for its detailed administration and to effectuate its purposes.
The legislature indicated its will and gave to the administrative body, which was to act under such general provisions, power to fill in the details by the establishment of administrative rules and regulations. See State v. Manning, 220 Iowa 525, 531, 532, 259 N. W. 213. Vilas v. Board of Assessment & Review, 223 Iowa 604, 619, 273 N. W. 338, 346, considers the
language of section 422.61 (in an earlier statute, section 6943-f55, Code of 1935) and states:
“Tbe rates are fixed by tbe legislature, tbe board merely determines when an individual comes witbin tbe classes prescribed by the legislature as being taxable under said rates. ’ ’
When a statute is ambiguous a long-continued practical construction placed upon it by the department of government charged with its enforcement is entitled to substantial weight. 50 Am. Jur., Statutes, section 309. However, tbe language now under consideration is not ambiguous in tbe sense that its meaning is doubtful. There was no failure on tbe part of tbe legislature to clearly express its intent. It merely elected to do so by general language and to charge tbe Commission with tbe duty of promulgating rules and regulations which would operate in the range of tbe legislative purpose and design.
This court considered tbe language of section 422.61 (in the former statute) in Sandberg Co. v. State Board of Assessment & Review, 225 Iowa 103, 108, 278 N. W. 643, 646, 281 N. W. 197, and stated, with reference to the Tax Commission Rule 19, relative to tbe retail sales tax upon shoe repairing:
“We are of tbe opinion that rule No. 19 is as fair, reasonable, and practicable as can be formulated, when applied to tbe vocation of shoe repairing. * * * When the business is considered as a whole, from tbe standpoint of administration under the law, tbe details of which, under tbe statute, are left to tbe board, we are inclined to agree with tbe trial court that rule No. 19 is reasonable and practicable and is not in contravention of tbe statute and hence is valid.”
Kistner v. State Board of Assessment and Review, 225 Iowa 404, 415, 416, 280 N. W. 587, 593, which considers the same language, points out that- the right to make rules and regulations is limited to such rules as carry out the provisions of the act, and holds Rule 49 is a reasonable rule passed for such purpose and hence is valid.
In Eule 172 the Commission’s interpretation of tbe expression “not readily obtainable in Iowa” is summarized as follows:
“Quantity available, price element, or purchaser’s preference for a particular brand or manufacture are not proper factors in determining the ‘readily obtainable’ question.!’
We have already referred to section 422.61, which empowers the Commission to make rules not inconsistent with the act, necessary and advisable for its detailed administration' and to effectuate its purposes. Sandberg Co. v. Board, supra, 225 Iowa 103, 278 N. W. 643, 281 N. W. 197, holds considerations of administration will be kept in view in the examination of such rules to determine if they contravene the statute. As stated in that case, the rule should be “reasonable and practicable.”
Thus, insofar as the proposition of “not readily obtainable” is covered by rule, the problem concerning it is not, strictly speaking, one of statutory construction. The question is whether the rule is reasonable, practical, and necessary to effectuate the purposes of the act — bearing in mind it is a revenue act designed to supplement and to protect the sales tax by removing any incentive to purchase outside Iowa to escape such tax and that one of its principal purposes is to protect Iowa dealers by placing their sales upon a tax equality with those of outside competitors.
As a matter of fact, the Commission formulated Eule 172 in view of these very considerations, stating therein:
“The Personal Property Use Tax Law, in addition to being a revenue law, is intended to serve as a complementary statute to our Eetail. Sales Tax Law, thereby placing the Iowa retailer selling tangible personal property in this state on a fair competitive basis with the out-of-state seller making sales for delivery in Iowa, insofar as the excise tax is concerned.”
The materials and equipment which the ’ trial court held not readily obtainable in Iowa may be placed in various classes, based upon the circumstances surrounding their purchase. They
are so grouped in the briefs and placed in separate divisions or propositions and will be thus considered.
Y. Proposition 2 refers to two relatively minor items purchased outside the state which the record indicates were then actually stocked in Iowa by dealers. The ease involves numerous items, the purchase price of which amounted to several hundred thousand dollars, and the record relative to those two items may have been overlooked. In any event, they present no problem since they were clearly readily obtainable in Iowa.
VI. Proposition 4 concerns out-of-state purchases where the identical product was not readily obtainable in Iowa but where comparable property was so obtainable.
Example: Plaintiff purchased insulators outside the state. Comparable insulators were stocked in Iowa.
This proposition is covered by the provision in Rule 172 of the Tax Commission that the purchaser’s preference for a particular brand or manufacture is not a proper factor in determining the readily obtainable question. It is clear this provision .of the rule is designed to effectuate the purpose of the statute to protect Iowa retailers. Protection.of Iowa dealers means full protection, which includes protection from arming out-of-state sellers of
competitive equipment
with a two per cent advantage. >
We determined the converse of this proposition in Dain Mfg. Co. v, Iowa State Tax Comm., supra, 237 Iowa 531, 22 N. W. 2d 786, aside from the rule. In that case the goods readily obtainable in Iowa were not of equal quality or were not of equal precision standard. We there stated an artiple is not readily obtainable in Iowa unless it can be procured in kind and quality fairly equivalent to the article purchased outside. The provision of Rule 172 concerning purchaser’s preference for a particular brand or manufacture is not contrary to this statement. It is applicable only to goods fairly equivalent in kind and quality. The burden is upon the taxpayer to prove they are not. The record here contains no such showing. Hence, these out-of-state purchases were not exempt from the use tax.
VII. Plaintiffs’ purchases were made through a purchasing agent who represented a number of utilities associated
in a purchasing group. Many purchases were made in large quantities to secure quantity prices and carload freight rates. In some instances orders were accumulated and carload shipments were pooled among various utilities. Plaintiffs themselves were large users of various materials and equipment.
Proposition 3 deals with materials and equipment purchased outside of Iowa when regular Iowa dealers had such materials and equipment in stock but not in the quantity ordered.
Example: Plaintiffs bought outside of Iowa copper wire of a certain size in lots of about forty thousand pounds. This wire was regularly handled by Iowa dealers but the quantities in stock in Iowa were less than these lots.
Proposition 5 refers to materials and equipment handled regularly by Iowa dealers as a normal part of their business but which were temporarily out of stock.
Example: Plaintiffs ordered thirteen transformers from the Davenport branch of General Electric Company. Ten were shipped to plaintiffs from the Davenport warehouse. The sales tax was paid on these. This temporarily exhausted the Iowa stock. The remaining three transformers were shipped by General Electric Company to plaintiffs from Pittsfield, Massachusetts. Plaintiffs refused to pay the use tax on these three.
It may be observed that plaintiffs’ pur chases, from General Electric Company were usually made by order given the Davenport branch office of General Electric Company. This office operated the Iowa warehouse, had three suboffices in other Iowa cities, employed a number of resident technical engineers and salesmen, and supervised and handled the orders of various Iowa apparatus agents and dealers. Plaintiffs paid the sales tax on such parts of their orders as were filled from the Davenport warehouse but contend such parts as were shipped them from warehouses outside the state were not readily obtainable in Iowa within the use-tax-law definition. They make the same contention relative to purchases from Westinghouse Manufacturing Company,. which company kept no stock in Iowa but maintained a sales organization with an office in Davenport,, to which plaintiffs’ orders were usually given.
Proposition 6 refers to materials and equipment not manufactured or stocked in Iowa which were of a character not to be regularly stocked in Iowa but which were regularly sold by Iowa dealers as a normal part of their business.
Example: Western red cedar electric poles are produced in Canada and northwestern United States and placed in a few concentration yards where they are given final treatment. Various Iowa dealers regularly sell such poles but do not stock them because the relatively heavy handling charges, freight charges, and small margin of profit practically forbid. It is the practice to handle them on a direct-shipment basis from a concentration point in carload lots. A similar situation exists with reference to wrapped steel pipe, used in gas-distribution systems, which is regularly handled by Iowa dealers on a direct-shipment basis as a normal part of their business.
Proposition 7 deals with materials and equipment not stocked in Iowa, when factory branches, resident agents or salesmen, or jobbers or dealers in Iowa were regularly engaged' in selling the same or comparable materials and equipment in Iowa as a normal part of their business.
Example: An Iowa dealer or agent handles the line of a manufacturer or wholesaler as a normal part of his usual business but does not stock it, or stocks only such parts of it as move readily, and handles orders on a direct-shipment basis.
Rule 172 of the Commission provides that quantity available is not a proper factor in determining the readily obtainable question. This has reference to stock, if any, physically present in Iowa, and is applicable to the various propositions stated in this division. Is this provision of Rule 172 reasonable, practical, and designed to effectuate the purpose of the act? If the use-tax act was enacted to protect Iowa stocks, the answer might well be in the negative. But the use-tax act was not designed to protect Iowa stocks. All authorities agree it was designed to protect the Iowa retailer. If the Iowa retailer regularly sells in Iowa (in whole or in part) from a stock pile outside of Iowa, such sales are subject to the Iowa sales tax. It matters not whether such sales are made from his own stock pile or that of another. In either event they are subject to the sales-
tax act. The use-tax act was designed to give him as much protection against ruinous competition from out-of-state sellers with a two per cent advantage as any other Iowa retailer. The failure to tax such purchases would drive such retailers out of business and thus open loopholes in the sales tax which the use-tax act was designed to plug. ;
It was the duty of the Commission to formulate rules and regulations which would make the act workable from an administrative standpoint. .This necessarily involved a comprehensive investigation of the nature of the goods sold by Iowa retailers and the manner in which they conducted their business. This court has not had the advantage of such over-all study and practical experience. The rule-making required the solution of various administrative problems with, which the Commission was more conversant than the courts. ¥e should not interfere with the Commission’s solution of such problems if reasonable and not in contravention of the statute.
We conclude the Commission’s rules and regulations relative to ready obtainability, under the record in this ease, are reasonable, practical, and necessary to effectuate the purpose of the* use-tax act and hence not inconsistent with its provisions, and that such rules and regulations are within the meaning of the phrase “not readily obtainable in Iowa” as that meaning is indicated by the legislative purpose to protect Iowa retailers. Hence, we hold the materials and equipment referred to in propositions 3, 5, 6, and 7 were not within the exception “not readily obtainable in Iowa.”
This holding is limited to materials . and equipment sold by regular Iowa dealers as a normal part of their usual business. Such holding is not contrary to Dain Mfg. Co. v. Iowa State Tax Comm., supra, 237 Iowa 531, 536, 537, 22 N. W. 2d 786, 790. In that ease the record showed merely that there was a person, firm, or corporation in Iowa that could have ordered the goods, etc. We there pointed out:
“There is no showing here that the ‘person, firm or corporation’ which stood ready to furnish an order was a regular dealer in goods of a comparable kind **-*.”
We stated also, “Our holding here is, of course, confined only to tbe facts as stipulated.”
The factual showing in the case at bar is essentially different.
VIII. Plaintiffs3 proofs showed certain cast-iron pipe used for gas distribution was not handled by Iowa dealers. Hence, it was “not readily obtainable in Iowa.”
IX. To obtain exemption from the use tax for materials and equipment plaintiffs were required to prove not only that the same were not readily obtainable in Iowa but also that they were “directly used in the actual fabricating, compounding, manufacturing, or servicing of tangible personal property intended to be sold ultimately at retail.3 3 Code section 423.1 (lc).
We have held the generation of electricity to be manufacturing. State ex rel. Winterfield v. Hardin County Rural Elec. Coop., 226 Iowa 896, 285 N. W. 219. The Commission concedes the equipment and materials purchased for the power plant and directly used in generating electricity would be directly used in manufacturing. The issue at this point involves only the electric distribution system.
A witness for plaintiffs testified:
“The essential function of an electric distribution system is to take electrical energy from the source at which it is produced, or supplied, to a given area, to take it to the place where it is delivered to the retail customer who will use it.”
It is not economically practicable to conduct electrical energy very far at low voltages.' It leaves the plant over transmission lines which carry high voltages. At distribution points such as cities, towns, and industrial plants this transmission voltage is usually stepped down to distribution voltage, and finally, at or near places of use, to the proper voltage for domestic or other uses.
This is accomplished by transformers which decrease the voltage (pressure) and which correspondingly increase the amperage (strength of flow). Transformers are used also to step up voltage. Witnesses for plaintiffs testified transformers
use the electric energy which flows into them to generate a new supply of electric energy of the same amount but with different characteristics. Hence, plaintiffs contend the process of manufacturing electricity continues throughout its transmission until it passes through the last transformer before it reaches the customer. Plaintiffs quote at length from Curry v. Alabama Power Co., 243 Ala. 53, 8 So. 2d 521. Plaintiffs also state: “The process of generation and distribution cannot be divided or separated, for without either the other fails.”
In Utah Power & Light Co. v. Pfost, 286 U. S. 165, 52 S. Ct. 548, 76 L. Ed. 1038, the court held a license tax by a state upon electricity generated therein and transmitted to and distributed in other states was not invalid under the commerce clause of the constitution. The decision points out that what constitutes manufacture must be determined upon practical considerations, and that while the generation and transmission of electricity are substantially instantaneous, they are essentially separable and distinct operations.
Forrester v. North Georgia Electric Membership Corp., 66 Ga. App. 779, 19 S. E. 2d 158, held a corporation which merely transformed and distributed electricity was not engaged in the production or development of electricity so as to exempt it from taxation.
Kentucky Elec. Co. v. Buechel, 146 Ky. 660, 143 S.
W.
58, 38 L. R. A., N. S., 907, Ann. Cas. 1913C, 714, held poles, wires, etc. of an electric company were not used in the manufacture of electricity so as to exempt that portion of its property from taxation.
The Iowa legislature has recognized that distribution may be separated from the manufacture of electricity in statutes empowering municipalities to purchase electricity and erect and maintain transmission lines for the sale thereof. See chapter 397, Code of 1946; Central States Elec. Co. v. Randall, 230 Iowa 376, 297 N. W. 804.
The record in this case shows the electricity, when generated at the plant, goes to two buses which are connected on circuits which take the energy out of the station and distribute it. An expert witness for plaintiffs testified:
“A bus * * * is tbe name for a single set of heavy conductors that serve as a collecting center in the plant, that is, you might say it is sort of a common platform in a factory— everything that is produced in the factory is brought to the platform and then from that platform it is loaded on trucks which take it away.”
There are 2,219 transformers in plaintiffs’ distribution system. It may be that technically each of these manufactures electric energy and that plaintiffs operated not one but two thousand electric manufacturing plants. But the language of the exception should be strictly construed against the taxpayer and the statute should be viewed from a practical standpoint. Plaintiffs’ expert witness referred to the collecting center at the electric plant as a common platform in a factory from which everything produced is loaded upon trucks which take it away. This expresses the situation from a practical standpoint.
As thus considered and strictly construed against the taxpayer the statute requires a holding that the distribution system was not directly used in manufacturing electricity within the meaning of said statute.
Plaintiffs contend also that the distributing system was directly used in servicing the electric energy. Rule 172 of the Tax Commission provides in part:
“The words ‘servicing of tangible personal property intended to be sold ultimately at retail’ as used in this law, mean something done to the property by a manufacturer or processor during the manufacturing state, which changes it and puts it in shape for distribution and sale.
“This phrase does not mean anything done to the property manufactured, in connection with its distribution and sale after the property shall have been manufactured. It means some act done or performed on the property itself during the manufacturing process.”
As applied to the record in this case we think this provision is reasonable and practical and that it does not contravene the statute. Although the word “servicing” has various meanings, the rule of strict construction against the taxpayer war
rants its construction in connection with the words “fabricating, compounding, and manufacturing,” with which it is associated in the processing exception.
Moreover, the legislature said in Code section 423.1(4), that for the purposes of this act electric energy is tangible ■personal property. As thus considered its distribution may be compared to that of unpaekaged commodities loaded upon trucks at the factory and delivered to customers. The transformer may be compared to the knife used to slice off the part of a load for customer use. One who hauls ice and cuts from a block sufficient ice for each householder’s needs is not a processor. He merely delivers the ice. His delivery may be termed a service to consumers but he does not service the ice. The ice is transported from the plant in large blocks, and the electric energy is transported at high voltages, not because large blocks or high voltages áre usable by consumers but because such methods of transportation are the most practical.
We hold the poles, wires, transformers, and other equipment in the distribution system were not directly used in manufacturing or servicing the electric energy within the meaning of the processing exception. It follows that such materials and equipment were not exempt from the use tax.
X. Plaintiffs do not manufacture gas but own and operate a system of gas mains and pipes through which they distribute natural gas to numerous customers. Plaintiffs purchase this natural gas from a company which operates a pipe line through the territory. At the stations where the gas is delivered to plaintiffs’ main by said pipe line, plaintiffs inject into it an odorant at the rate of about one pound per million cubic feet of gas. Plaintiffs receive the gas at relatively high pressures, which áre successively reduced at various points in the transmission and distribution mains and pipes. It is delivered to customers at relatively low pressures. In this respect the method of distribution is similar to that used in electric distribution systems. Likewise, it is employed because at is the most-practical method of distribution.
Various authorities hold the distribution of gas -is not manufacturing. Covington Gas-light Co. v. City of Covington,
84 Ky. 94, 8 Ky. L. R. 442; Consolidated Gas Co. v. Mayor and City Council of Baltimore, 62 Md. 588, 50 Am. Rep. 237; State ex rel. Minneapolis Gaslight Co. v. Lord, 132 Minn. 419, 157 N. W. 638. Plaintiffs do not contend otherwise. They contend the gas distributing system is directly used in servicing the gas.
Our conclusion that the poles, wires, transformers, etc. do not service the electric energy is applicable to this contention and results in a holding that the main pipes, valves, regulators, etc. do not service the gas within the meaning of the processing exception. Hence, such materials and equipment were not exempt.
XI. The briefs refer to a few other items, some of which plaintiffs concede should have been held taxable. The others were not shown to have been not readily obtainable in Iowa and need not be considered from the processing standpoint.
The result of our conclusions, above stated, is that none of the industrial materials and equipment was shown to be exempt from the use tax. — Reversed.
Bliss, Hale, and Hats, JJ., concur.
Smith and Mantz, JJ., dissent.
Garfield, J., takes no part.
MulRONey, J., having been formerly of counsel, takes no part.
"WENNERSTRUM, J., absent on leave, takes no part.