Summary

Nathan Clifford Bailey v. New York Central Railroad Company…

If they conferred on the respective stockholders any greater interest in the earnings or capital of the corporation than they had before receiving them, then they were a stock dividend though called 'interest certificates.' If they did not, they are not a stock dividend. Congress did not intend to tax dividends in stock which were not so in fact, and did not seek, while in search of income, to subject to tax that which is not income.
Source: Wikisource

Nathan Clifford Bailey v. New York Central Railroad Company…

Taken in a general sense the stock of an incorporated company may be defined to mean the capital of the company in the form of transferable shares of a specified amount, but the word is frequently employed in a much more restricted sense. Stock, when it means anything else than the capital of a corporation, usually refers to the interests of the respective shareholders, and the aggregate of those interests may with propriety in many cases be denominated the stock of the corporation.
Source: Wikisource

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