This case comes before the court on defendant’s exceptions to the recommended decision of Trial Judge Harry E. Wood, filed April 7, 1977, pursuant to Rule 134(h), having been submitted on the briefs and oral argument of counsel. Upon consideration thereof, since the court agrees with the trial judge’s recommended decision, as hereinafter set forth, it hereby affirms and adopts the decision as the basis for its judgment in this case**. Accordingly, it is concluded that plaintiff is entitled to recover and judgment is entered for plaintiff with the amount thereof to be determined in further proceedings pursuant to Rule 131(c).
*198OPINION OF TRIAL JUDGE
Wood, Trial Judge:In this action, plaintiff, a corporation engaged during its fiscal year ended March 31, 1974, in the business of strip mining coal in western Kentucky, sues to recover $90,705 in federal income taxes, plus deficiency interest of $5,666 thereon, paid in consequence of the Internal Revenue Service’s denial of a deduction for depletion claimed by plaintiff on its federal income tax return for the said fiscal year.
The issue is whether plaintiff possessed "an economic interest” in certain coal in place under a February 14, 1973 agreement styled "Coal Mining Lease and Sublease” between American Metal Climax, Inc. (AMAX) and James R. Thornberry, and a March 1, 1973 assignment from , James R. Thornberry to plaintiff. If, as plaintiff contends, it had such an interest, it was entitled to a proper deduction for depletion, while if defendant’s contrary argument is valid, the petition should be dismissed. For reasons hereinafter set forth, it is concluded that plaintiff is entitled to recover.
I
From 1963 to 1972, James M. Thornberry (plaintiffs sole stockholder during the tax year in suit), worked as general manager of Thornberry Construction Company, an unincorporated business owned by his father, James R. Thorn-berry. During that period, Thornberry Construction Company engaged in, among other things, the construction of haul roads from mines, mine sites, roads and dams, and, during the period 1970-72, in mining operations in southern Indiana. Thornberry Construction Company’s clients included AMAX, and AMAX’s upper management level personnel thus came to know both James R. Thornberry and James M. Thornberry. In early 1973, James M. ’ Thornberry purchased all of the stock of Thornberry Construction Company, Inc., from his father, and became (and was throughout the fiscal year ended March 31, 1974) plaintiffs president and operating manager.
*199Sometime prior to 1973, James R. Thornberry had informed AMAX that if it ever had a block of coal extraneous to its mining operations, he would be interested in leasing the block of coal and operating a mine. On February 14, 1973, AMAX and Mr. Thornberry entered into the "Coal Mining Lease and Sublease” (sometimes hereinafter "the lease”) at the center of this litigation, and shortly thereafter Mr. Thornberry made an assignment of the lease to plaintiff. At least in defendant’s view, however, the lease and the assignment must be viewed in the light of precedent facts and circumstances, described hereinafter.
Coal in western Kentucky lies under the surface in beds or seams that are described by numbers. Each seam has distinct British Thermal Unit (BTU) and other quality characteristics. No. 12 coal, a low quality, thick seam coal, overlies no. 11 coal, a medium quality, thick seam coal. While these two seams are usually separated by several feet of limestone, they are always mined together. No. 12 coal normally has a BTU rating of 10,800 to 11,000, while no. 11 coal normally has a BTU rating of about 11,000. No. 9 coal, a substantially better coal with lower ash content, has an average BTU rating of 11,300 to 11,400.
During the fall of 1969, Ayrshire Coal Company (which in October 1969 merged into and became a division of AMAX) began mining no. 12 and no. 11 coals at the Ayrgem Mine, Muhlenberg County, Kentucky. Most of the coals mined at the Ayrgem Mine were sold to the Tennessee Valley Authority for delivery to the Paradise Steam Plant, a TVA facility some 10 miles from the Ayrgem Mine. From almost the inception of mining operations at the Ayrgem Mine, AMAX experienced only marginal profitability from such operations because of a low profit realization on its TVA contract. In order to increase the profitability of its Ayrgem mining operations, AMAX sought to, and, commencing in 1970, did, sell a portion of its Ayrgem coals to Mr. Thomas W. Talbert, an independent coal broker.
Mr. Talbert had an agreement with Dairyland Power Cooperative ("Dairyland”), LaCrosse, Wisconsin, to purchase coal for it each year in and after 1969, and, in effect, resold to Dairyland the Ayrgem coals he purchased from AMAX. *200While the Talbert-Dairyland agreement did not contain any specific BTU guarantee or requirement, at least some of AMAX’s agreements with Mr. Talbert did contain a BTU rating guarantee (10,500 in 1970, and 10,000 in 1971). In 1971, and in each of the years thereafter through 1974, Mr. Talbert purchased from AMAX 400,000 tons of Ayrgem coals.
For 1973, Mr. Talbert was attempting to furnish to Dairyland coal having an average BTU rating of 10,500. By that time, however, the no. 12 and no. 11 coals produced at the Ayrgem Mine had deteriorated in quality to the point where the Ayrgem blend, with an average BTU rating of only 9,500, was about to reach a noncompetitive position with other coals available on a BTU basis. AMAX realized that, if it were to continue to sell the Ayrgem blend to Mr. Talbert, an upgrading in quality was necessary. The only way the Ayrgem blend could be upgraded was to blend it with a better quality coal.
For several years prior to 1973, AMAX had owned a seam of no. 9 coal, amounting to more than 2,000,000 tons, adjacent to its Ayrgem Mine. For a number of reasons (including the undesirability of putting a small satellite operation around the Ayrgem Mine, the confusion and labor problems such an operation would cause, a lack of proper equipment with which to strip the no. 9 coal reserve, and a lack of management to supervise the operation), AMAX had determined that it was not economically feasible or practical for it to mine this seam of no. 9 coal itself, and that determination was, as of 1973, still a valid one from AMAX’s standpoint.
In early 1973, AMAX was well aware of Mr. Talbert’s problems with AMAX’s Ayrgem coals. It knew, too, that unless it took steps designed to result in an upgrading of those coals, Mr. Talbert probably would not accept them in the future because of their inferior BTU quality, and that its own no. 9 coal reserve adjacent to the Ayrgem Mine was the only known available source of high quality coal that could be economically blended with the Ayrgem coals being sold to Mr. Talbert. Since mining the no. 9 coal was, for AMAX, neither economically feasible nor otherwise practical, however, leasing the no. 9 coal to a lessee who would *201mine it and sell it to Mr. Talbert (and pay AMAX a royalty) made excellent sense from AMAX’s standpoint, since it would permit depletion of the no. 9 coal, allow AMAX to enhance its profit position at the Ayrgem Mine, and also result in AMAX’s receipt of a profit from the mining of the no. 9 coal.
In late January or early February 1973, Mr. Hopper, president of AMAX Coal Company, advised James R. Thornberry, in substance, that AMAX was interested in leasing its no. 9 coal to someone who would mine it and sell to Mr. Talbert a sufficient amount thereof to blend with Ayrgem coals to upgrade the latter. Mr. Thornberry indicated he would be interested in entering into such a transaction. Mr. Hopper told Mr. Thornberry he was sure Mr. Thornberry would be able to sell coal to Mr. Talbert on the basis of a fair deal, and that if Mr. Thornberry could "work out something” with Mr. Talbert, AMAX would lease the no. 9 coal to Mr. Thornberry.
At Mr. Hopper’s invitation, James R. Thornberry and James M. Thornberry then went to AMAX’s office in Indianapolis, Indiana, where they were introduced to, and met separately with, Mr. Talbert. After discussion of Mr. Talbert’s no. 9 coal requirements for a 2-year period (some 800,000 tons), and with access to the results of geological surveys of AMAX’s no. 9 coal reserve conducted by AMAX prior to January 1973, James M. Thornberry concluded that plaintiff could profitably operate a mine based on what Mr. Talbert indicated he was willing to pay for no. 9 coal at that time.
Prior to February 14, 1973, James M. Thornberry and Mr. Talbert entered into an oral agreement for the sale by plaintiff to Mr. Talbert of approximately 400,000 tons of no. 9 coal per year, for 2 years, at a stated, mutually agreeable, price per ton. The oral agreement included a "cost escalation” provision, but, because coal prices were then relatively stable, possible price increases due to changes in market conditions were neither anticipated nor discussed.1 AMAX took no part in the negotiations between *202James M. Thornberry and Mr. Talbert, nor was it even aware of the terms and conditions of the oral agreement between them. In particular, AMAX played no part whatever in the determination of the per ton price Mr. Talbert would pay to plaintiff for coal mined and sold to Mr. Talbert. Thereafter, James R. Thornberry and James M. Thornberry advised Mr. Hopper that they had reached an agreement with Mr. Talbert, and that they would like to lease AMAX’s no. 9 coal reserve.
On February 14, 1973, AMAX and James R. Thornberry entered into a "Coal Mining Lease and Sublease” providing, in substance, that AMAX, for a stated consideration, "does hereby lease, sublease and let unto” Mr. Thornberry "all of the Kentucky #9 Vein or Seam of coal * * * underlying * * *” 384.4 acres (less 2 acres commonly known as the Wilcox Cemetery) in Muhlenberg County, Kentucky, granting during the term of the lease "all of the mining rights and privileges owned * * * appurtenant to said premises, and * * * the right to enter onto, under, over, across and through the Kentucky #9 Coal and the surface and subsurface overlying the same at such points and in such manner as may be necessary or convenient for the purpose of mining all of the Kentucky #9 Vein of coal hereby leased * * *.”
The lease was for a term ending February 28, 1975, and provided that AMAX would be paid a royalty of 75¡¡f per ton for each ton of no. 9 coal mined, removed, and sold from the leased premises. It contained a "Diligent Operation” clause, provided that mining operations should be performed so as not to interfere with AMAX’s operation of the Ayrgem Mine, and required the lessee to perform reclamation work under the agreement in a manner consistent with such work at the Ayrgem Mine.
Clause (6),2 the principal if not the sole basis for defendant’s insistence that the lease was "nothing more than a contract to mine coal”, provided in pertinent part as follows:
*203(6) Sale of Coal to Tom Talbert. It is expressly agreed by the Lessor and the Lessee that all Kentucky #9 Coal from the leased premises shall be sold to Tom Talbert. In the event that the coal, for any reason, is not sold to Tom Talbert, then and in such event, the Lessor shall have the option to terminate this Lease without further obligation or liability on the part of either party to the other party hereto * * *.
From AMAX’s standpoint, the basic intent of the lease was to make a sufficient amount of no. 9 coal available to Mr. Talbert, and, had James M. Thornberry not reached an agreement with Mr. Talbert, it is doubtful that AMAX would have leased the no. 9 coal to James R. Thornberry. The record is clear, however, that AMAX had no objection whatever to plaintiffs sale of no. 9 coal to others, provided Mr. Talbert did not need it. The record is equally clear that both the oral agreement with Mr. Talbert and the lease were bona fide, arm’s-length transactions, and that the results of the said agreements were to the benefit of all concerned.
On March 1, 1973, James R. Thornberry assigned to plaintiff all of his right, title and interest in and to the lease "until such time as the Assignee has removed 800,000 tons of coal from the property.” Plaintiff agreed, among other things, to make royalty payments to AMAX as prescribed in clause (3), and to sell coal to Mr. Talbert as prescribed in clause (6), of the lease.
Following March 1, 1973, plaintiff began a mining operation on the leased property. It retained an engineering firm to perform certain work required in connection with obtaining a strip mining permit in Kentucky and laying out a mining operation. It bought approximately $900,000 worth of equipment with which to begin strip mining operations. It constructed a haul road and a stockpile area for use in removing coal from the mining area and stockpiling it. It relocated the entrance road to the Wilcox Cemetery (surrounded by no. 9 coal reserve), and also relocated a county road running through the leased property, in order that all of the minable coal on the said property might be removed. It also obtained and paid for a reclamation bond, and secured a strip mining permit.
*204Plaintiffs mining development engineering costs, the costs of construction of the haul road and stockpile area, and the cost of relocation of the cemetery entrance road were deducted by plaintiff as current business expenses. Plaintiffs costs of acquisition of equipment, and its costs for relocation of the county road, were capitalized on its books, and for federal income tax purposes were subject to depreciation deductions in plaintiffs fiscal year ended March 31, 1974.
During its fiscal year ended March 31, 1974, plaintiff mined, and hauled to its stockpile, approximately 442,000 tons of no. 9 coal. Mr. Talbert’s trucks picked up the coal there and it was transported to the Rochester Dock where the net weight of the coal was determined and weigh tickets were prepared. Plaintiffs invoices reflect that, during the said fiscal year, it sold to Mr. Talbert some 442,000 tons of coal, and Mr. Talbert paid plaintiff the amount shown to be due it on the said invoices.3 AMAX, which received a copy of each weigh ticket, billed plaintiff for the 75(¿ per ton royalty due it under the terms of the lease and assignment, and plaintiff paid AMAX the amounts shown to be due it on AMAX’s billings.
On March 1, 1974, and effective April 1, 1974, AMAX and plaintiff executed an amendment to the lease adding additional acreage to that described in the lease, and increasing AMAX’s royalty to $1.25 per ton. Following (and as a result of) that addition, plaintiff acquired by purchase, at a cost of $110,000, surface rights in certain reserves of no. 9 coal.4 Neither plaintiff nor James R. Thornberry owned any surface rights in any of the property described in the lease prior to March 31, 1974, however.
II
In the case of mines and other natural deposits, Section 611(a) of the Internal Revenue Code of 1954 provides for the deduction of "a reasonable allowance for depletion *205* * * according to the peculiar conditions in each case; such reasonable allowance in all cases to be made under regulations prescribed by the Secretary or his delegate. * * *” A depletion allowance of 10 percent of "the gross income from the property”,5 excluding from such gross income an amount equal to any rents or royalties paid or incurred by the taxpayer in respect of the property, is authorized in the case of coal, provided that such allowance shall not exceed 50 percent of the taxpayer’s taxable income from the property (computed without allowance for depletion). Sections 613(a), 613(b)(4).
Pursuant to Section 611(a), the Treasury Department has duly prescribed regulations under which "a reasonable allowance for depletion * * * shall be allowed * * *.”6 Treasury Regulation § 1.611 — 1(b)(1) (1970) provides in part as follows:
(b) ECONOMIC INTEREST. (1) Annual depletion deductions are allowed only to the owner of an economic interest in mineral deposits * * *. An economic interest is possessed in every case in which the taxpayer has acquired by investment any interest in mineral in place * * * and secures, by any form of legal relationship, income derived from the extraction of the mineral * * * to which he must look for a return of his capital. But a person who has no capital investment in the mineral deposit * * * does not possess an economic interest merely because through a contractual relation he possesses a mere economic or pecuniary advantage derived from production. For example, an agreement between the owner of an economic interest and another * * * entitling the latter to compensation for extraction * * * does not convey a depletable economic interest. * * *
The concept of an "economic interest” was first enunciated in Palmer v. Bender, 287 U.S. 551 (1933). There, in dealing with a predecessor of Section 611(a), the Supreme Court held that "The language of the statute is broad enough to provide, at least, for every case in which the taxpayer has acquired, by investment, any interest in the oil in place, and secures, by any form of legal relationship, *206income derived from the extraction of the oil, to which he must look for a return of his capital.” Id., 287 U.S. at 557.
The concept has since "been elaborated upon and refined in a host of judicial decisions * * Filtrol Corp. v. United States, 203 Ct. Cl. 32, 35, 487 F.2d 536, 538 (1973). See, e.g., Paragon Jewel Coal Co. v. Commissioner, 380 U.S. 624, 633 (1965); Parsons v. Smith, 359 U.S. 215 (1959); Commissioner v. Southwest Exploration Co., 350 U.S. 308 (1956); Bakertown Coal Co. v. United States, 202 Ct. Cl. 842, 485 F.2d 633 (1973); National Steel Corp. v. United States, 176 Ct. Cl. 952, 364 F.2d 375 (1966). Both the theory underlying the allowance of depletion deductions with respect to the production of minerals, and the principles governing the allowance or denial of such deductions, are settled and familiar, and they need not be repeated herein.7
In Parsons v. Smith, supra, taxpayers who had entered into agreements with landowners to strip mine coal on land owned by the latter, at the taxpayers’ expense, and deliver it to the landowners at a fixed payment per ton, were held not to have a "capital investment in, or * * * any economic interest in, the coal in place * * but "a mere economic advantage to be derived from their mining operations.” Id.
In reaching that result, the Supreme Court stressed that the taxpayers’ investments were in their equipment, all of which was movable; that the said investments in equipment were recoverable through depreciation; that the mining contracts were completely terminable without cause on short notice; that the landowners did not agree to surrender and did not actually surrender to the taxpayers any capital interest in the coal in place; that the coal, even after being mined, at all times belonged entirely to the landowners, and that the taxpayers could not sell or keep any of it but were required to deliver all that they mined to the landowners; that the taxpayers were to have no part of *207the proceeds of the sale of the coal, but, rather, a fixed sum for each ton mined and delivered to the landowners in "full compensation” for their efforts; and that "petitioners, thus, agreed to look only to the landowners for all sums to become due them under their contracts.” Id., 359 U.S. at 225.
In Paragon Jewel Coal Co. v. Commissioner, supra, a number of contractors orally agreed with Paragon, a lessee of coal properties, to mine coal at their own expense and to deliver it to the lessee at a fixed fee per ton for mining. The lessee expected to receive the depletion allowance, and fixed its per ton fee for mining with this in mind. The oral agreements were silent respecting termination and were apparently for an indefinite period, but imposed no obligation on the contractors to mine any specific amount of coal. Relying upon Parsons v. Smith, supra, the Supreme Court rejected the contention of the contractors that because of their investments of time and money in developing the mines they had an "economic interest in the coal in place.” Id., 380 U.S. at 633. In so holding, the Court stressed that "the contract miners did not look to the sale of the coal for a return of their investment, but looked solely to Paragon to abide by its covenant.” Id., 380 U.S. at 635.
These decisions and others, cited by defendant as requiring the conclusion that the February 14, 1973 lease from AMAX to James R. Thornberry, and the March 1, 1973 assignment from Mr. Thornberry to plaintiff, did not convey a depletable economic interest in the coal in place, but gave plaintiff a mere economic advantage, are, on the facts of this record, sharply distinguishable. With respect to depletion, "the tax law deals in economic realities and not in bare legal abstractions * * * or in fictions * * *.” National Steel Corp. v. United States, supra, 176 Ct. Cl. at 967, 364 F.2d at 383. The facts of this case establish that plaintiff had an economic interest in the coal in place throughout the tax year in suit.
It is, of course, true that whether an instrument creating rights is a lease, sublease, or assignment "has not been deemed significant from the federal tax viewpoint in determining whether or not the taxpayer had an economic *208interest in * * *” a mineral in place. Burton-Sutton Oil Co. v. Commissioner, 328 U.S. 25, 32 (1946). And, whether "a taxpayer has an 'economic interest’ in certain property * * * depends on the totality of the facts of each case.” Ramey v. Commissioner, 398 F.2d 478 (6th Cir. 1968). In insisting that what is involved here is a mere "contract to mine coal”, however, defendant errs.
Pursuant to the March 1, 1973 assignment of the February 14, 1973 lease of coal, plaintiff became obligated diligently to conduct mining operations (to the extent of removal of 800,000 tons of coal from the leased property), to make royalty payments to AMAX at the rate of 75^ per ton of no. 9 coal mined, removed and sold from the leased property, and to perform all other obligations imposed upon plaintiffs assignor by the terms of the lease. Plaintiff made substantial expenditures in connection with mining and selling the coal (mining engineering expenses, equipment costs, expenses of construction of a haul road and stockpile, the costs of relocating a cemetery entrance road and a county road, and the costs of a strip mining permit and a reclamation bond). It acquired (although not during the fiscal year ended March 31, 1974) surface rights at a cost of $110,000. In all the circumstances, it is crystal clear that plaintiff acquired by investment an interest in the coal in place, within the meaning of Treas. Reg. § 1.611 — 1(b)(1). Bakertown Coal Co. v. United States, supra; see also Paragon Jewel Coal Co. v. Commissioner, supra; Winters Coal Co. v. Commissioner, 496 F.2d 995 (5th Cir. 1974); cf. Casey, The Economic Interest - Play it Again Sam, 24 Tax Lawyer 129 (1970).
Nor, in the facts and circumstances of this case, is there doubt that plaintiff fully satisfies the remaining language of Treas. Reg. § 1.611 — 1(b)(1), as it defines an "economic interest”.
AMAX’s primary purpose and intent in leasing its no. 9 coal reserve to plaintiffs assignor was, obviously and understandably, to serve its own best corporate interests. Most, if not all, business decisions are so motivated. Moreover, had plaintiff and Mr. Talbert not reached an agreement which would at least enhance the likelihood of, if not ensure, the achievement of its goals, AMAX might *209well have decided not to lease the said reserve at all. In and of themselves, however, the foregoing facts are plainly not dispositive of the issue herein.
What distinguishes this case from Parsons v. Smith, supra, and Paragon Jewel Coal Co. v. Commissioner, supra (and from other cases cited by defendant) is that, as a matter of form, of substance, and of economic reality, the lease and assignment conferred upon plaintiff the rights to mine coal and to sell that coal, at whatever price it could obtain therefor, to an independent, unrelated, third party (albeit a valued customer of AMAX), and not to AMAX itself.
Put another way, plaintiff was not simply extracting coal for AMAX under a contract with AMAX from which it derived a pecuniary advantage, but was mining coal for sale to a third party, at an independently determined price, and was required to look to the extraction of that coal and the sale thereof for a return on its investment and profit. See, particularly, Bakertown Coal Co. v. United States, supra, 202 Ct. Cl. at 855-56, 485 F.2d at 640, where Chief Judge Drennan’s dissent in Charles P. Mullins, 48 T.C. 571 (1967) is quoted with approval.
A taxpayer who has acquired by investment any interest in mineral in place and who "secures, by any form of legal relationship, income derived from the extraction of the [mineral] * * * to which he must look for a return of his capital” is entitled to a depletion allowance. Palmer v. Bender, supra. As a matter of economic reality, plaintiff satisfies the letter and the spirit of the latter requirement. Pursuant to a bona fide, arm’s-length legal relationship, it secured income derived from the extraction of coal, and it could and did look solely to the income thus derived for a return of its capital. Id.; Bakertown Coal Co. v. United States, supra. Accordingly, defendant’s denial of a depletion allowance was erroneous.
Several other facts should briefly be noted, since they tend to confirm the conclusion just stated. First, the record is clear that AMAX had no objection whatever to plaintiffs sale of no. 9 coal to others, provided Mr. Talbert did not need it. Second, AMAX retained no control over plaintiffs management or mining operations; it never saw any *210mining plans, mining permits, or reclamation plans. Third, in AMAX’s view, plaintiff owned the coal it mined. And, AMAX treated the royalty payments it received from plaintiff as capital gains under Section 631(c), thus demonstrating its intent to convey, and belief it had conveyed, an economic interest in the coal in place to plaintiff. Cf. Parsons v. Smith, supra; Paragon Jewel Coal Co. v. Commissioner, supra; Bakertown Coal Co. v. United States, supra, 202 Ct. Cl. at 857, 485 F.2d at 642.
Ill
In its brief, defendant also contends that if plaintiff is entitled to a depletion allowance, plaintiffs computation of the allowance is excessive. Defendant asserts that in computing its taxable income to arrive at the 50 percent limitation stated in Section 613(a), plaintiff erroneously included state income taxes as an addition, rather than a deduction, in its calculations. Plaintiffs reply brief contains no mention of this matter.
Neither party has requested findings of fact on this aspect of the case. Pursuant to Rule 131(c), trial of this matter was limited to the issues of law and fact relating to plaintiffs right to recover. In the circumstances, it is concluded only that plaintiff was erroneously denied a properly computed depletion allowance for its fiscal year ended March 31, 1974, and is entitled to recover taxes and interest assessed in consequence of such erroneous denial, plus interest thereon as provided by law. The amount of plaintiffs recovery should be determined pursuant to Rule 131(c).
Whereas the court adopts the trial judge’s separate findings of fact which are set forth in his report filed April 7,1977, they are not printed herein since such facts as are necessary to the decision are contained in his opinion.
Mr. Talbert did, however, agree to two increases in price, unrelated to increased costs, in 1974: a $1.00 per ton market increase in August, and a $3.50 per ton market increase in November.
Clause (6) was inserted in the February 14,1973 agreement by AMAX. The basis therefor was to emphasize that AMAX’s principal reason for the transaction was to provide no. 9 coal to Mr. Talbert, in order to enhance AMAX’s profit position at the Ayrgem Mine.
During its fiscal year ended March 31, 1974, plaintiff bore all of the costs incurred in connection with its mining operation, and its only receipts of money were from coal sold to Mr. Talbert.
Clause (6) of the lease remained in force unchanged.
For present purposes, defined as "the gross income from mining.” Section 613(c)(1).
Treas. Reg. § 1.611-0 (1970).
See National Steel Corp. v. United States, 176 Ct. Cl. 952, 965-67, 364 F.2d 375, 382-83 (1966), for a succinct statement of the teaching of the leading cases. It is worthy of note, however, that the depletion allowance "bears little relationship to the capital investment, and the taxpayer is not limited to a recoupment of his original investment. The allowance continues so long as minerals are extracted, and even though no money was actually invested in the deposit.” Commissioner v. Southwest Exploration Co., 350 U.S. 308, 312 (1956); see also Paragon Jewel Coal Co. v. Commissioner, 380 U.S. 624, 639 (1965) (dissenting opinion).