310 REPORT—1890. 
Fourth Report of the Committee, consisting of Professors TILDEN 
and Ramsay, and Dr. Nicot (Secretary), appointed for the 
purpose of investigating the Properties of Solutions. 
Tue Committee during the past year have continued the experiments on 
the Mutual Solubility of salts in water, and report as follows :— 
The salts examined fall into two classes when arranged in pairs. 
1. The solubility of one of the salts is affected to precisely the same 
extent by the addition of each successive portion of the other salts; as is 
the case with 
NaCl in solutions of KCl, 
NaCl 4 » NaNO,, 
KCl 2 3 KNO;, 
NaNO, ” ” KNOs. 
Here, therefore, the salts share the water between them. 
2. The solubility of one of the salts is not proportional to the amount 
of the other salt present, but is a steadily decreasing quantity in the 
case of 
KCI in solutions of NaCl, 
KNO, ” ” KCl, 
NaNO, . 55 », NaCl, 
and a steadily increasing quantity in the case of KNO; in solutions of 
NaNO. 
The Committee find that further experiments on the molecular volumes 
of the solutions are required before the work can be considered complete, 
and will at once proceed with these. They have also decided to examine 
the atomic volumes of carbon, hydrogen, and oxyger in organic sub- 
stances when dissolved in various solvents. They therefore desire 
to be reappointed. 
Fourth Report of the Committee, consisting of Professors TILDEN, 
M‘LEop, PIckERING, Ramsay, and YounG, and Drs. A. R. LEEDS 
and Nico (Secretary), appointed for the purpose of reporting 
on the Bibliography of Solution. 
Tue Committee report that considerable advance has been made with 
the work, which is now approaching completion. During the past year 
over 300 volumes have been examined, including the ‘Chemical News,’ 
the ‘Journal of the Society of Chemical Industry,’ the ‘Journal of the 
Chemical Society,’ Liebig’s ‘Annalen,’ and the ‘Chemical Gazette.’ 
These contained 255 papers, bringing the total number of papers to 930. 
The Committee have to thank Miss E. J. Lloyd and Mr. A. J. Cooper 
for their valuable assistance in carrying on the work. The Committee 
desire to be reappointed. 
