. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. seed inthe days work of one week, with the labor of one man at 20*. and three boys at ; and will require a 12-horse power to work it well, along with the rolls and theedge-stones. i am indebted to my excellent friend Mr. E. Wooisey, for the following most valuablenotes, taken by him at sundry mills for pressing oil; and remarks upon the subject ofseed-crushing in general. The chief point of diflference depends upon the quality of seed employed. Heavyseed will yield most oil,
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. seed inthe days work of one week, with the labor of one man at 20*. and three boys at ; and will require a 12-horse power to work it well, along with the rolls and theedge-stones. i am indebted to my excellent friend Mr. E. Wooisey, for the following most valuablenotes, taken by him at sundry mills for pressing oil; and remarks upon the subject ofseed-crushing in general. The chief point of diflference depends upon the quality of seed employed. Heavyseed will yield most oil, and seed ripened under a hot sun, and where the flax is notgathered too green, is the best. The weight of linseed varies from 48 to 52 lbs. perimperial bushel; probably a very fair average is 49 lbs., or 392 lbs. per imperialquarter. I inspected one of the seed-crushers books, and the average of 15 trials of aquarter each of different seeds in the season averaged 141 galls, of 7f lbs. each; say,109 lbs. of oil per quarter. This crusher, who uses only the hydraulic press, and onepressing, informed me thatâ. Archangel seed will yield from - - -Best Odessa .. crushing-seed - - -Low seed, such as weighs 48 lbs. per bushel - 15 to 16 galls, (of 7|lbs. each) - 18 and even 19 galls. - 15i 13i do. OILS, UNCTUOUS. 907 The average of the seed he has worked, which he represents to be of an inferiorquality, for the sake of its cheapness, yields 141 galls, per quarter. I had some Ameri-can seed which weighed 52j lbs. per imperial bushel, ground and pressed under myown observation, and it gave me 111 lbs. oil; that is to say, 418 lbs. of seed gave 111lbs. oil=26A5- per cent. A friend of mine, who is a London crusher, told me the oilvaried according to the seed from 14 to 17 galls.; and when you consider the relativevalue of seeds, and remember that oil and cake from any kind of seed is of the same value,it will be apparent that the yield is very different; for example. E. India
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