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25

upon pressure.  They are tough and leathery and their taste somewhat disagreeably bitter. 
Three experiments were made to extract the oil, Exp. III, however, being the only satisfactory one.

[[circled and underlined]] Experiment I [[/circled and underlined]] 
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On expression at an elevated temperature a quantity of a whitish emulsion was obtained the oil from which refused to separate although permitted to stand in a tall glass vessel for several days, during this period the emulsion darkens in color. Agitating with petroleum spirit resulted in obtaining 2'35 per cent of fixed oil, an amount that was plainly extremely low. This was due to the fact that sufficient pressure could not be brought to with the small hand-press which was used, but even though a powerful machine be employed I strongly doubt if more than 10 per cent. could be got, at all events this process is not a desirable in this case since