June 27, 1902.] 



SCIENCE. 



1015 



Abnormal Results in the Hydrolysis of 

 Amygdaline: Professor J. W. Walkek 

 and Mr. W. S. Hutchinson. 

 Boiled with dilute acids amygdaline is 

 resolved into glucose, hydrocyanic acid 

 and benzaldehyde. Heated with concen- 

 trated hydrochloric acid it yields a hu- 

 mus substance and dextro-mandelic acid. 

 Boiled with dilute alkalies it yields am- 

 monia and amygdalinic acid, which on 

 hydrolysis with dilute hydrochloric acid 

 gives inactive mandelic acid. 



Oudemann's Law, and the Influence of 

 Dilution on the Molecular Rotation of 

 Mandelic Acid and its Salts: Professor 

 J. W. Walker. 



Strong indications were found that the 

 law was not confirmed in very dilute solu- 

 tions, where it ought to hold most rigidly. 



Specific Heats of Organic Liquids, and 

 Their Heats of Solution in Organic Sol- 

 vents: Professor J. W. Walkee and 

 Dr. J. Henderson. 



An electric method is employed for de- 

 termining the specific heat; a close con- 

 nection is indicated between the degree of 

 association of a liquid and its heat of solu- 

 tion in an unassociated solvent. 



The Specific Heat of Water of Crystalliza- 

 tion: Mr. N. N. Evans. 

 The solid, finely ground, is suspended in 

 a suitable liquid in the calorimeter, and a 

 measured quantity of heat is introduced 

 electrically. A range of four degrees is 

 sufficient for accurate results. 



Researches in Physical Chemistry Carried 

 Out in the University of Toronto Dimng 

 the Past Year. Communicated by Pro- 

 fessor W. Lash Miller. 

 Under this head the following eight 



papers were introduced. 



Application of Polarimetry to the Determi- 

 nation of Tartaric Acid in Commercial 

 Products: Professor E. Kenrick and 

 Dr. F. B. Kenrick. 



The method is based on the addition of 

 ammonium molybdate to the material to 

 be analyzed; it is applicable in the pres- 

 ence of alum, iron, sugar, etc. 



The Sulphates of Bismuth : Dr. F. B. Al- 

 lan. 

 An application of the phase rule. The 



following salts were identified : Bi203.4S03, 



Bi203.2S03.2iH20, Bi^Og.SOs. i^m. 



Chem. Jour., 27, 284:.) 



The Influence of Iron Salts on the Rate of 

 Reaction Between Chromic Acid and 

 Iodides: Miss C. C. Benson. 

 The rate of liberation of iodine as a 

 function of the concentrations of the react- 

 ing substances; and the rate of oxidation 

 of ferrous salt by chromic acid in presence 

 and absence of iodide. 



The Reaction Between Stannous Chloride 

 and Potash: Mr. C. M. Carson. 

 The results are in conflict with those of 



Ditte. 



The Rate of Oxidation of Iron Salt^ by 



Oxygen: Mr. J. "W. McBain. 



Experiments carried out under the di- 

 rection of Dr. F. B. Kenrick. {Jour. Phys. 

 Chem., Y., 623.) 



The Rate of Reaction in Solutions Con- 

 taining Potassium Chlorate, Potassium 

 Iodide, and Hydrochloric Acid: Mr. W. 

 C. Bray. 

 Experiments showing that two reactions 



of the fourth order occur simultaneously. 



Schlundt's results are recalculated. 



The Rate of the Reaction Between Arseni- 

 ous Acid and Iodine in Acid Solution; 

 the Rate of the Reverse Reaction; and 

 the Equilibrium Between Them: Mr. J. 

 E. Roebuck. 



