80 



SCIENCE. 



[N. S. Vol. XXII. No. 551. 



Some Neiv Salts of the Nitrosulphoienzoic 



Acids: Edward Hart. 

 Adrenalin, the Active Principle of the 



Suprarenal Gland: T. B. Aldrich. 



The formula C9H13NO3, first proposed 

 by the author, has been confirmed by vari- 

 ous investigators. The structure, several 

 details of which are certain, is possibly 

 represented by one of the two following 

 f ormulse : 



OH 



OH 



CHOHCH2NHCH3 



I. 



OH 

 /NOH 



ppr^CHjOH 



II. 



Compounds synthetically prepared on the 

 lines of formula I. seem to be similar phys- 

 iologically to adrenalin, but recent work 

 by the author gives like evidence for II. 

 The work is being continued. 



The Efficiency of Copper Foil in Destroy- 

 ing Certain Bacteria in Water: W. H. 



BUHIJG. 



Several sets of experiments, made along 

 the lines suggested by the recent work of 

 Moore, show that at incubator temperature 

 the typhoid bacillus disappears in a few 

 hours in the presence of copper, but at 

 room temperature, in hydrant water, it 

 persists several days. In the case of the 

 colon bacillus the copper treatment has 

 little practical value, but the dysentery 

 bacillus appears to yield quickly. 



Colloidal Suspensions and their Relations 

 to Problems in Water Purification: J. 

 W. Ellms and J. F. Snell. 

 Turbid water show many of the prop- 

 erties of colloidal suspensions, e. g., the 

 Tyndall effect, migration of the turbidity 

 under the influence of the electric current, 

 coagulation by electrolytes, etc. A possible 

 explanation of the mechanism of coagula- 

 tion by sulphates of aluminum and iron is 

 the formation of positively charged col- 

 loidal hydrates, which precipitate the nega- 



tively charged colloidal particles in the 

 water. Experiments are in progress on 

 the relative concentrations of colloidal sus- 

 pensions and electrolytes required for pre- 

 cipitation and the influence of substances 

 in retarding the coagulation. 



The Com,position of Cooked Foods: W. D. 



BiGELOW. 



Artificial Digestion Experiments: Edward 



GUDEMAN. 



As the result of a large series of artificial 

 digestion experiments with pepsin and 

 pancreatin on egg albumen with reference 

 to the interference of preservatives, colors, 

 and condiments, the following conclusions 

 are drawn: {a) Preservatives and condi- 

 ments do not interfere with peptic and 

 pancreatic artificial digestion when in the 

 proportion of 1 part to 400 or less, in acid 

 medium. (&) Acid preservatives and 

 condiments increase the factor of digesti- 

 bility in neutral medium, (c) In alkaline 

 medium the results are abnormal, retard- 

 ing the action of ferments. {d) Colors, 

 irrespective of source or origin, whether 

 animal, vegetable, mineral or synthetic, do 

 not affect artificial digestion when used in 

 quantities of 1 part or less to 400 parts of 

 the food products. (e) Vegetable and 

 synthetic colors are directly digested in the 

 same proportions by pepsin and pancreatin 

 and the actual food value of both classes 

 is the same. 



Notes on Occurrence of Pentosans in Sec- 

 ond Pressing Cider: J. A. Le Clerc and 



L. M. TOLMAN. 



Color Tests for Cod-liver Oil: W. D. Bige- 



LOW. 



The Presence of Hexone Bases in Bacteria: 



Mary F. Leach. 



Dried and pulverized bacteria belonging 

 to the colon group were digested with 

 thirty-three and one third per cent, sul- 

 phuric acid for several hours, until the pro- 



