Scientific Opinion Volume 3

Scientific Opinion Volume 3

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 edition. Excerpt: ...The genera Rbinolophns, Aritens, Aquias, and Bhinonyoteris were dealt with. Professor Redtenbacher read a communication from Professor H. Will, of Giessen, on the chemical constitution of white mustard-seed. Differing from black mustard-seed, whioh contains myronate of potassium, the white contains an analogous compound, sinalbin, whioh appears to resolve itBelf into sugar, a sulpho-oyanogen compound, and an acid Bulphato salt. The sulpho-cyanogen compound is involatile, and contains an oxygen-radical, Akrinyl (C, H,0). In the acid sulphate referred to, the potassium base is replaced by sinapisin. The following scheme explains the relation of their bodies: --Mjronate of potash. Sugar. "'PJlJ'j Potassic sulphate. C10HJ9NSaK010 C8HiaO + C4HsNS + S04KH. Sulpho-cyanogen Sinalbio. Sugar. oompoand of Acid sulphate of aijiqpiain. Afrinrl. C,0H44N4S20, C6H1(,0, + C.H, NOS + S04(C, H14NO, )H. The sulpho-cyanogen compound of akrinyl deprived of its sulphur, and when in the state of nitryl added to an alkali, gives ammonia and the salt of an acid = C8H,0s, which at 136 melts, and is indentioal with no ooid which is known. NOTES AND MEMORANDA. The British Journal of Photography's Prize to Photographers' Assistants.--The British Journal has done a good thing in offering a prize of this kind. The prize, which is for the best essay on any subjeot of practical interest to photographers, written by any one belonging to this class, will assume the shape of a complete set of apparatus for carte pictures, to be supplied by first-class London makers; and it is to be distinctly understood that photographers' assistants only are invited to compete for the prize. All competitive communication muBt be tent, addressed to the editors, on or before the last...
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Product details

  • Paperback | 796 pages
  • 189 x 246 x 40mm | 1,393g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236654927
  • 9781236654922