required to be made as a condition to the continued use or possession, for purposes of the trade or business, of property to which the taxpayer has not taken or is not taking title or in which he has no equity;

(2) All interest paid or accrued within the taxable year on indebtedness, except on indebtedness incurred or continued to purchase or carry obligations or securities (other than obligations of the United States issued after September 24, 1917, and originally subscribed for by the taxpayer) the interest upon which is wholly exempt from taxation under this title;

(3) Taxes paid or accrued within the taxable year except (a) income, warprofits, and excess-profits taxes imposed by the authority of the United States, (b) so much of the income, war-profits and excess-profits taxes, imposed by the authority of any foreign country or possession of the United States, as is allowed as a credit under section 222, (c) taxes assessed against local benefits of a kind tending to increase the value of the property assessed, and (d) taxes imposed upon the taxpayer upon his interest as shareholder or member of a corporation, which are paid by the corporation without reimbursement from the taxpayer. For the purpose of this paragraph estate, inheritance, legacy, and succession taxes accrue on the due date thereof except as otherwise provided by the law of the jurisdic-| tion imposing such taxes;

(4) Losses sustained during the taxable year and not compensated for by insurance or otherwise, if incurred in trade or business;

(5) Losses sustained during the taxable year and not compensated for by insurance or otherwise, if incurred in any transaction entered into for profit, though not connected with the trade or business; but in the case of a nonresident alien individual only if and to the extent that the profit, if such transaction had resulted in a profit, would be taxable under this title. No deduction shall be allowed under this paragraph for any loss claimed to have been sustained in any sale or other dis

which the taxpayer has not taken or is not taking title or in which he has no equity;

(2) All interest paid or accrued within the taxable year on indebtedness, except on indebtedness incurred or continued to purchase or carry obligations or securities (other than obligations of the United States issued after September 24, 1917), the interest upon which is wholly exempt from taxation under this title as income to the taxpayer, or, in the case of a nonresident alien individual, the proportion of such interest which the amount of his gross income from sources within the United States bears to the amount of his gross income from all sources within and without the United States;

(3) Taxes paid or accrued within the taxable year imposed (a) by the authority of the United States, except income, warprofits and excess-profits taxes; or (b) by the authority of any of its possessions, except the amount of income, war-profits and excess-profits taxes allowed as a credit under section 222; or (c) by the authority of any State or Territory, or any county, school district, municipality, or other taxing subdivision of any State or Territory, not including those assessed against local benefits of a kind tending to increase the value of the property assessed; or (d) in the case of a citizen or resident of the United States, by the authority of any foreign country, except the amount of income, war-profits and excess-profits taxes allowed as a credit under section 222; or (e) in the case of a nonresident alien individual, by the authority of any foreign country (except income, war-profits and excess-profits taxes, and taxes assessed against local benefits of a kind tending to increase the value of the property assessed), upon property or business;

(4) Losses sustained during the taxable year and not compensated for by insurance or otherwise, if incurred in trade or business;

(5) Losses sustained during the taxable year and not compensated for by insurance or otherwise, if incurred in any transaction entered into for profit, though not connected with the trade or business; but in the case of a nonresident alien individual only as to such transactions within the United States;

position of shares of stock or securities made after the passage of this Act where it appears that within thirty days before or after the date of such sale or other disposition the taxpayer has acquired (otherwise than by bequest or inheritance) substantially identical property, and the property so acquired is held by the taxpayer for any period after such sale or other disposition. If such acquisition is to the extent of part only of substantially identical property, then only a proportionate part of the loss shall be disallowed;

(6) Losses sustained during the taxable year of property not connected with the trade or business (but in the case of a nonresident alien individual only property within the United States) if arising from fires, storms, shipwreck, or other casualty, or from theft, and if not compensated for by insurance or otherwise. Losses al lowed under paragraphs (4), (5), and (6) of this subdivision shall be deducted as of the taxable year in which sustained unless, in order to clearly reflect the income, the loss should, in the opinion of the Commissioner, be accounted for as of a different period. In case of losses arising from destruction of or damage to property, where the property so destroyed or damaged was acquired before March 1, 1913, the deduction shall be computed upon the basis of its fair market price or value as of March 1, 1913;

(7) Debts ascertained to be worthless and charged off within the taxable year (or, in the discretion of the Commissioner, a reasonable addition to a reserve for bad debts); and when satisfied that a debt is recoverable only in part, the Commissioner may allow such debt to be charged off in part;

(8) A reasonable allowance for the exhaustion, wear and tear of property used in the trade or business, including a reasonable allowance for obsolescence. In the case of such property acquired before March 1, 1913, this deduction shall be computed upon the basis of its fair market price or value as of March 1, 1913; (9) In the case of buildings, machinery, equipment, or other facilities, constructed, erected, installed. or acquired, on or after April 6, 1917, for the production of articles contributing to the prosecution of the war against the German Government. and in the case of vessels constructed or acquired on or after such date for the transportation of articles or men contributing to the prosecution of such war, there shall be allowed, for any taxable year ending before March 3, 1924 (if claim therefor was made at the time of

(6) Losses sustained during the taxable year of property not connected with the trade or business (but in the case of a nonresident alien individual only property within the United States) if arising from fires, storms, shipwreck, or other casualty, or from theft, and if not compensated for by insurance or otherwise;

(7) Debts ascertained to be worthless and charged off within the taxable year;

(8) A reasonable allowance for the exhaustion, wear and tear of property used in the trade or business, including a reasonable allowance for obsolescence;

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(9) In the case of buildings, machinery, equipment, or other facilities, structed, erected, installed, or acquired, on or after April 6, 1917, for the production of articles contributing to the prosecution of the present war, and in the case of vessels constructed or acquired on or after such date for the transportation of articles or men contributing to the prosecution of the present war, there shall be allowed a reasonable deduction for the amortization of such part of the cost of such facilities or vessels as has been borne

filing return for the taxable year 1918, 1919, 1920, or 1921) a reasonable deduction for the amortization of such part of the cost of such facilities or vessels as has been borne by the taxpayer, but not again including any amount otherwise allowed under this title or previous Act of Congress as a deduction in computing net income. At any time before March 3, 1924, the Commissioner may, and at the request of the taxpayer shall, reexamine the return, and if he then finds as a result of an appraisal or from other evidence that the deduction originally allowed was incorrect, the income, war-profits, and excess-profits taxes for the year or years affected shall be redetermined; and the amount of tax due upon such redetermination, if any, shall be paid upon notice and demand by the collector, or the amount of tax overpaid, if any, shall be credited or refunded to the taxpayer in accordance with the provisions of section 252;

(10) In the case of mines, oil and gas wells, other natural deposits, and timber, a reasonable allowance for depletion and for depreciation of improvements, according to the peculiar conditions in each case, based upon cost including cost of development not otherwise deducted: Provided, That in the case of such properties acquired prior to March 1, 1913, the fair market value of the property (or the taxpayer's interest therein) on that date shall be taken in lieu of cost up to that date: Provided further, That in the case of mines, oil and gas wells, discovered by the taxpayer, on or after March 1, 1913, and not acquired as the result of purchase of a proven tract or lease, where the fair market value of the propery is materially disproportionate to the cost, the depletion allowance shall be based upon the fair market value of the property at the date of the discovery, or within thirty days thereafter: And provided further, That such depletion allowance based on discovery value shall not exceed the net income, computed without allowance for depletion, from the property upon which the discovery is made, except where such net income so computed is less than the depletion allowance based on cost or fair market value as of March 1, 1913; such reasonable allowance in all the above cases to be made under rules and regulations to be prescribed by the Commissioner, with the approval of the Secretary. In the case of leases the deductions allowed by this paragraph shall be equitably apportioned between the lessor and lessee;

by the taxpayer, but not again including any amount otherwise allowed under this title or previous Acts of Congress as a deduction in computing net income. At any time within three years after the termination of the present war, the Commissioner may, and at the request of the taxpayer shall, reexamine the return, and if he then finds as a result of an appraisal or from other evidence that the deduction originally allowed was incorrect, the taxes imposed by this title and by Title III for the year or years affected shall be redetermined; and the amount of tax due upon such redetermination, if any, shall be paid upon notice and demand by the collector, or the amount of tax overpaid, if any, shall be credited or refunded to the taxpayer in accordance with the provisions of section 252;

(10) In the case of mines, oil and gas wells, other natural deposits, and timber, a reasonable allowance for depletion and for depreciation of improvements, according to the peculiar conditions in each case, based upon cost including cost of development not otherwise deducted: Provided, That in the case of such properties acquired prior to March 1, 1913, the fair market value of the property (or the taxpayer's interest therein) on that date shall be taken in lieu of cost up to that date: Provided further, That in the case of mines, oil and gas wells, discovered by the taxpayer, on or after March 1, 1913, and not acquired as the result of purchase of a proven tract or lease, where the fair market value of the property is materially disproportionate to the cost, the depletion allowance shall be based upon the fair market value of the property at the date of the discovery, or within thirty days thereafter; such reasonable allowance in all the above cases to be made under rules and regulations to be prescribed by the Commissioner with the approval of the Secretary. In the case of leases the deductions allowed by this paragraph shall be equitably apportioned between the lessor and lessee;

(11) Contributions or gifts made within the taxable year to or for the use of: (A) The United States, any State, Territory, or any political subdivision thereof, or the District of Columbia, for exclusively public purposes; (B) any corporation, or community chest, fund, or foundation, organized and operated exclusively for religious, charitable, scientific, literary, or educational purposes, including posts of the American Legion or the women's auxiliary units thereof, or for the prevention of cruelty to children or animals, no part of the net earnings of which inures to the benefit of any private stockholder or individual; or (C) the special fund for vocational rehabilitation authorized by section 7 of the Vocational Rehabilitation Act; to an amount which in all the above cases combined does not exceed 15 per centum of the taxpayer's net income as computed without the benefit of this paragraph. In case of a nonresident alien individual this deduction shall be allowed only as to contributions or gifts made to domestic corporations, or to community chests, funds, or foundations, created in the United States, or to such vocational rehabilitation fund. Such contributions or gifts shall be allowable as deductions only if verified under rules and regulations prescribed by the Commissioner, with the approval of the Secretary;

(12) If property is compulsorily or involuntarily converted into cash or its equivalent as a result of (A) its destruction in whole or in part, (B) theft or seizure, or (C) an exercise of the power of requisition or condemnation, or the threat or imminence thereof; and if the taxpayer proceeds forthwith in good faith, under regulations prescribed by the Commissioner with the approval of the Secretary, to expend the proceeds of such conversion in the acquisition of other property of a character similar or related in service or use to the property so converted, or in the acquisition of 80 per centum or more of the stock or shares of a corporation owning such other property, or in the establishment of a replacement fund, then there shall be allowed as a deduction such portion of the gain derived as the portion of the proceeds so expended bears to the entire proceeds. The provisions of this paragraph prescribing the conditions under which a deduction may be taken in respect of the proceeds or gains derived from the compulsory or involuntary conversion of property into cash or its equivalent, shall apply so far as may be practicable to the exemption or exclusion of such proceeds or gains from gross income under prior income, war-profits and excess-profits tax acts.

(11) Contributions or gifts made within the taxable year to corporations organized and operated exclusively for religious, charitable, scientific, or educational purposes, or for the prevention of cruelty to children or animals, no part of the net earnings of which inures to the benefit of any private stockholder or individual, or to the special fund for vocational rehabilitation authorized by section 7 of the Vocational Rehabilitation Act, to an amount not in excess of 15 per centum of the taxpayer's net income as computed without the benefit of this paragraph. Such contributions or gifts shall be allowable as deductions only if verified under rules and regulations prescribed by the Commissioner, with the approval of the Secretary. In the case of a nonresident alien individual this deduction shall be allowed only as to contributions or gifts made to domestic corporations, or to such vocational rehabilitation fund;

(b) In the case of a nonresident alien individual, the deductions allowed in subdivision (a), except those allowed in paragraphs (5), (6), and (11), shall be allowed only if and to the extent that they are connected with income from sources within the United States; and the proper apportionment and allocation of the deductions with respect to sources of income within and without the United States shall be determined as provided in section 217 under rules and regulations prescribed by the Commissioner with the approval of the Secretary. In the case of a citizen entitled to the benefits of section

(12) (a) At the time of filing return for the taxable year 1918 a taxpayer may file a claim in abatement based on the fact that he has sustained a substantial loss (whether or not actually realized by sale or other disposition) resulting from any material reduction (not due to temporary fluctuation) of the value of the inventory for such taxable year, or from the actual payment after the close of such taxable year of rebates in pursuance of contracts entered into during such year upon sales made during such year. In such case payment of the amount of the tax covered by such claim shall not be required until the claim is decided, but the taxpayer shall accompany his claim with a bond in double the amount of the tax covered by the claim, with sureties satisfactory to the Commissioner, conditioned for the payment of any part of such tax found to be due, with interest. If any part of such claim is disallowed then the remainder of the tax due shall on notice and demand by the collector be paid by the taxpayer with interest at the rate of 1 per centum per month from the time the tax would have been due had no such claim been filed. If it is shown to the satisfaction of the Commissioner that such substantial loss has been sustained, then in computing the tax imposed by this title the amount of such loss shall be deducted from the net income. (b) If no such claim is filed, but it is shown to the satisfaction of the Commissioner that during the taxable year 1919 the taxpayer has sustained a substantial loss of the character above described then the amount of such loss shall be deducted from the net income for the taxable year 1918 and the tax imposed by this title for such year shall be redetermined accordingly. Any amount found to be due to the taxpayer upon the basis of such redetermination shall be credited or refunded to the taxpayer in accordance with the provisions of section 252.

(b) In the case of a nonresident alien individual the deductions allowed in paragraphs (1), (4), (7), (8), (9), (10), and (12), and clause (e) of paragraph (3), of subdivision (a) shall be allowed only if and to the extent that they are connected with income arising from a source within the United States; and the proper apportionment and allocation of the deductions with respect to sources of income within and without the United States shall be determined under rules and regulations prescribed by the Commissioner with the approval of the Secretary.