292 



APPENDIX 



151. Dihydroxyacetone (p. 242). 



An oxidising Bacterium obtained 

 from wine vinegar produces dihydroxy- 

 acetone from glycerol (Sazerac, Comp. 

 Rend. 137, 90). 



154. Dextrose (p. 344). 



In place of the constitutional formula 

 given in the text a ( lactone ' (alkylene 

 oxide) formula was proposed by Tollens 

 in 1883 (Ber. 16, 923) : 



HO HO HO H HO 



. C C C C C CH 2 . OH 



H 



H H 



-o- 



H 



Further evidence in support of this 

 formula has recently been advanced, so 

 the literature is now given: Sorokin, 

 Journ. pr. Ch. [2] 37, 312; Erwig and 

 Koenigs, Ber. 22, 2207; 23, 672; 

 Skraup, Monats. 10, 401 ; Wohl, Ber. 

 23, 2098 ; E. F. Armstrong, Trans. 

 Ch. Soc. 83, 1305; Lowry, Ibid. 1314. 

 Dextrose is present in small quantity 

 in all the organs and tissues of the dog 

 and horse in the normal state (Cadeac 

 and Maignon, Comp. Rend. 136, 1682). 

 Human cerebrospinal fluid drawn by 

 lumbar puncture contains dextrose 

 (Rossi, Zeit. physiol. Ch. 39, 183: 

 see also Donath, Ibid. 526). The 

 globulins of blood on decomposition by 

 hydrobromic acid yield dextrose among 

 other carbohydrates, and may therefore 

 contain the dextrose complex (Lang- 

 stein, Ch. Centr. 1903, 1, 239). Gly- 

 collic aldehyde administered to rabbits 

 appears as dextrose in the urine (Paul 

 Mayer, Zeit. physiol. Ch. 38, 135). 

 Dextrose is present in human cephalo- 

 rachid liquid (Grimbert and Coulaud, 

 Comp. Rend. 136, 391). 



155. Laevulose (p. 247). 



Further researches on the relationship 

 between the soluble ferments and the 

 polysaccharides which they hydrolyse 

 (gentianose, &c.) have been published 

 by Bourquelot (Comp. Rend. 136, 762). 



Stachyose, a sugar obtained from the 



tubercles of StacJiys tuberifera, contains 

 the galactose, dextrose, and Isevulose 

 complexes (v. Planta and Schulze, Ber. 



23, 1692; 24, 2705; Landw. Versuchs. 

 Sta. 35, 473). According to Tanret 

 this tetrose is identical with the manneo- 

 tetrose (p. 248) of manna (Comp. Rend. 

 136, 1569). 



Lsevulose is among the carbohydrates 

 resulting from the decomposition of the 

 globulins from horse blood serum by 

 hydrobromic acid (Langstein, Monats. 



24, 445> 



156. Maiinose (p. 248). 



Salep mucilage (p. 248) has been 

 shown by analysis to be a tetrasacchar- 

 ide of d-mannose, and it is converted 

 quantitatively into the latter sugar on 

 hydrolysis (Hilger, Ber. 36, 3199). 

 A manno-galactan has been obtained 

 from Melilotus leucantha (Herissey, 

 Comp. Rend. Soc. Biol. 54, 1174). 



161. Methyl Mercaptan (p. 252). 



Egg-meat mixture is rapidly decom- 

 posed by Bacillus coli communis with 

 the formation of mercaptan (? methyl) 

 among other products (Rettger, Am. 

 Journ. Physiol. 8, 284). 



165. Secondary Butyl Isotliio- 

 cyanate (p. 254). 



To be added to synthetical pro- 

 cesses : 



[A, p. 254.] The vapour of n-butyl 

 alcohol passed over alumina heated to 

 500-520 gives 25-30 per cent, n- 

 butylene (Ipatieff, Ber. 36, 1999). 



169. Benzyl Isotliiocyanate (p. 257). 



To be added to synthetical pro- 

 cesses : 



[A, p. 258.] Benzamide in pyridine 

 solution is converted into benzonitrile 

 by the action of carbonyl chloride (Ein- 

 horn and Mettler, Ber. 35, 3647). 



[B, p. 258.] For electrolytic reduc- 

 tion of benzaldoxime to benzylamine 

 see Germ. Pat. 141346, Bohringer and 

 Sohne ; Journ. Ch. Soc. 84, I, 550. 



