IIL.s. ON SOLUBILITY. 805 
judging from the large amount of information recorded, there is little 
well-defined class-behaviour. In a similar manner the solubility of 
a number of salts in acetone and methylal was investigated by 
Kidmann.®® 
1901 A comparison of the solubility of carbon dioxide in forty-four 
"different solvents was made by Just °°: glycerol was found to 
have least solvent power; next came water. This author found that 
in the case of homologous series, the solvent power diminished with 
increasing molecular weight. The solubilities of nitrogen, hydrogen, 
and carbon monoxide in seventeen different solvents were also measured, 
and it was observed that when the solvents were arranged in order of 
solyent power for each of these gases, the arrangement was practically 
the same as for carbon dioxide. 
1902 Kahlenberg and Schlundt *** made an exceptionally complete 
* study of the solvent power of liquid hydrogen cyanide, compar- 
able with the work of Franklin and Krauss on liquid ammonia. They 
found a large number of substances to be soluble in this solvent; some 
of them, such as potassium iodide, potassium cyanide, sulphur trioxide, 
and hydrogen sulphate, give good conducting solutions. 
Speyers *** compared the solubilities of a number of organic sub- 
stances in water and in the lower alcohols: no regularity in solubility 
was observed as the series of alcohols was ascended, and Schréder’s * 
equation was not confirmed. 
1903 Nitromethane was found by Bruner 1°* to dissolve antimony 
* trichloride, antimony tribromide, mercuric chloride, tribrom- 
acetic and other organic acids, and to be an ionising solvent. 
Mittasch *** found numerous inorganic and partly organic electrolytes 
to be very sparingly soluble in nickel carbonyl, whilst some non-electro- 
lytes, such as camphor and alcohol, are more soluble. 
1905 Fleckenstein 74° compared the solubility of ammonium nitrate 
* in water with that in methylic and ethylic alcohols, and among 
other interesting results found that ethylic alcohol diminished the solu- 
bility of the salt in water, whilst methylic alcohol increased it. 
In the same year the solubility of mercuric chloride in ethylic acetate 
and in acetone was examined by Aten.?3 Miiller 74° made the interest- 
ing observation that ferrous and ferric hydroxides are readily soluble 
in glycerol, whilst the hydoxides of aluminium and chronium are only 
sparingly soluble in that solvent. Schréder ?** found that pyridine is 
in many respects comparable with water as a solvent. The solubility 
of zine hydroxide in alkaline solutions formed the subject of an investi- 
gation by Moir,?*° and Buchner *** studied the solubility of a large 
number of organic solids and liquids in liquid carbon dioxide, and he 
classified them according as they were or were not completely miscible 
1906 with the liquefied gas. Liquid methylamine was used as a solvent 
* by Gibbs,?*7 who found that it was a better solvent of organic 
compounds than liquid ammonia, but not so good a solvent of inorganic 
compounds. Ruff and Geisel *°’ experimented with liquid ammonia as a 
solvent of the metals sodium, potassium, and lithium, and could find 
no indication of any combination between metal and solvent. 
*-Part I., R. 202 ; Zeitschr. physikal. Chem., 11, 449. 
