Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 813
greasing machinery. A black tarry oilyet remains; and, finally, after the separation of this, a quantity of coke.The products are subjected to certain processes of purification, which neednot here be described. The magnitude of the American oil trade may beinferred from the fact that in the second… … Fig. 345.— Vtew on Hyde and Fgberfs Farm^ Oil Creek. price at which this excellent illuminating and lubricating agent can be pro-duced. Refined petroleum can be bought at Pittsburg for 16 cents, pergallon. It is believed by some that the supplies of petroleum which existin various localities are so…
Inventions
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