MNR v. Taylor, 56 DTC 1125, [1956] CTC 189 (Ex Ct) -- summary under Business

A transaction whereby the taxpayer purchased lead and resold it to his employer at a gain was an adventure in the nature of trade - notwithstanding that he engaged in the transaction in order to assist the business of his employer (of which he is a general manager) rather than to make a profit, and notwithstanding that this was the only transaction of that type which he had engaged in personally - in light of the fact that "he dealt with the lead in exactly the same manner as any dealer in imported lead would have done" (p. 1139), in light of the speculative nature of the transaction, and in light of the fact that lead is a commodity rather than property of an investment nature.