14 EXPERIMENT STATION RECORD. 



tion of tlie pancreas solution. lu the case of aniseed residue, whicli, 

 as mentioned above, resisted tlie action of pepsin solution, all of the 

 pepsin-insoluble nitrogen of the food passed into the feces, showing 

 that in the case even of umbelliferous seed residues natural digestion 

 was not more effective than artificial digestion by KUhn's method. 



The main points brought out by these investigations are that in arti- 

 ficial digestion of feeding stuffs 500 cc. of pepsin solution with 1 per 

 cent of HOI should be allowed to act on 2 gm. of substance for at 

 least 48 hours; that in some cases the action should be prolonged to 

 84 hours; that treatment with alkaline i:)ancreas solution appears to be 

 superfluous, and the action due alone to the soda in the solution; tliat 

 the nitrogen dissolved by alkaline j)ancreas solution is not digestible 

 by ruminants; that animals do not digest more than is dissolved by 

 pepsin solution by Kiihn's method; and that Kiihn's method gives the 

 amount of digestible protein in ordinary feeding stuffs. 



Effect of chloroform on artificial digestion with pepsin, Dubs 

 {Virehow''s Arch. path. Anat. and Fhysiol., 131, pp. 51IJ-540). — Experi- 

 ments were made on the effect of chloroform on the digestion of albu- 

 minoids by a hydrochloric acid solution of scale pepsin and a hydro- 

 chloric acid extract of the lining of the stomach. In small doses — 

 that is, 0.23 to 0.30 per cent — chloroform was found to promote the 

 solvent action of the scale pepsin, but iu large doses it checked the 

 action. The effect of chloroform on the hydrochloric acid extract of 

 the stomach was the same, except that larger doses were required to 

 check the action, about 0.7 per cent of chloroform promoting the sol- 

 vent action in this case. This difference is believed to be due to the 

 presence of albuminoid bodies in the pepsin i^repared directly from the 

 stomach. The difference was more pronounced the larger the amount 

 of these albuminoid bodies present. Conducting a current of air 

 through the digestive solution had an unfavorable effect on the arti- 

 ficial digestion, which was more marked in the case of the scale pepsin. 

 Aside from the above action, chloroform in a large excess, had a purely 

 mechanical influence, weakening the digestive solution by sex^aratiug 

 the pepsin. 



Report of the convention of the Association of Austrian Food Chemists and 

 Microscopists in Vienna, May 10 and 11, 1894 {Chem. Zifj., IS (i'SDd), i\"o. 41, pp. 

 763-7G6). 



A new chemical element (?), K. J. Bayer {Chem. Ztg., IS {1894), No. 37, pp. 671, 

 672). 



Concerning the hydrogen peroxide of the atmosphere, E. Schone {Ber. deut. 

 chem. Ges., S7 (1S94), No. 9, pp. 1233-1235). 



The chemistry of plant cell membranes, part III, E. Schulze {Ztschr. phijsiol. 

 Chem., 19, pp. 3S-G9; abs. in Boi. Centhl., 58 {1894), No. 6, pp. 209, 210). 



On the chemistry of chlorophyll, E. Schunck and Marchlewski {Ann. Chem., 

 278 {1894), No. 3, pp. 329-345). 



Concerning the nucleo-proteids, O. Hammarsten ( fT^^saZa Idkareforenings fiir- 

 hatidUmjen, 1893, pp.l-lSj abs, in Ccutbl. agr, C}iem., 23, No. 5, pp. 301-303). 



