CHEMISTRY — MORSEj NOYES. 153 



The work now in progress is as follows : (i) A second series of measure- 

 ments of the osmotic pressure of glucose ; (2) a determination of the press- 

 ure of solutions of lactose; and (3) a determination of the osmotic pressure 

 of cane-sugar solutions in the vicinity of 0°. 



The second problem has a special interest in connection with the molecule 

 of water of crystallization which is contained by lactose, the question being 

 whether, in solution, this water will or will not be found to play the part of 

 solvent. 



The determination of the pressure of cane-sugar solutions at low tempera- 

 tures may be expected to furnish some evidence as to the validity of the usual 

 explanation of the abnormal freezing-points of such solutions; for if, as sup- 

 posed, the sugar appropriates a portion of the solvent, thus bringing about 

 a concentration of the solution, we may expect to obtain abnormally high 

 osmotic pressures at temperatures in the neighborhood of the freezing-points. 



In the work upon osmotic pressure there have been associated with the 

 author during the past year Dr. J. C. W. Frazer and Messrs. P. B. Dunbar, 

 E. J. Hoffman, B. S. Hopkins, W. L. Kennon, and B. F. Lovelace. 



Noyes, Arthwr A*, Massachusetts Institute of Technology, Boston, Massa- 

 chusetts. Grant No. 325. Researches upon {i) Electrical condtidivity 

 of aqueous sohitio7is at high temperatures; (2) Electrical transference deter- 

 minatiojis in aqueous sohitions. (For previous reports see Year Book No. 

 2, p. XXXI; Year Book No. 3, p. 109, and Year Book No^ 4, p. 154.) 



$2,000. 



These researches have been continued during the past year in the Research 

 Laboratory of Physical Chemistry of the Massachusetts Institute of Tech- 

 nology. The first has been executed with the assistance of Mr. Arthur C. 

 Melcher, Mr. Guy W. Eastman, and Mr. Robert B. Sosman, and the second 

 with that of Mr. Edward W. Washburn. A series of twelve articles, which 

 describe fully the methods and results, has been submitted to the Carnegie 

 Institution of Washington for publication and is now in press. As the 

 general results obtained are fully and concisely presented in the closing 

 pages of that publication, a brief reference to the new experiments will 

 here suffice. 



During the past year the work done upon the electrical conductivity of 

 aqueous solutions at high temperatures has consisted in an extension of the 

 measurements previously made with various salts to certain strong acids, 

 namely, nitric, hydrochloric, sulphuric, and phosphoric acids at temperatures 

 up to 306°. 



The research previously referred to on the ionization of weak acids and 

 bases and the hydrolysis of their salts has been continued by measuring the 

 conductivity of ammonium hydroxide and acetic acid and studying the 



