1910. |] with the State of Aggregation of Matter. pig 
The general parallelism between these actions and that of the solvent 
action on serum globulin is manifest, although there are in case of weaker 
acids noticeable deviations, for the reasons already described. 
The salts of polyvalent metals have also a slightly stronger inhibitory 
action than those of the univalent metals, and this is indicated in the 
following tables. The experiments here recorded were carried out by adding 
10 c.c. of the normal salt solution to 10 c.c. of 5-per-cent. peptone solution, 
and then precipitating by 4 c.c. of 40-per-cent. aldehyde solution. After 
standing for a day the precipitate was filtered off, and the nitrogen was 
estimated in aliquot parts of the filtrate. The total nitrogen was estimated 
also in a corresponding portion in which no precipitation took place, and in a 
‘ portion in which 10 c.c. of peptone was diluted with 10 c.c. of water instead 
of salt solution. 
Table giving the Relative Amount of Precipitation in Presence of Various 
Chlorides. 23 per cent. peptone in N/2 solutions of salts. 
| Chlorides. | Chlorides. 
Water ..... one 100 °0 Magnesium ............ 25 °5 
1 Gio) (ORT ae aero eane eee 49 -O Calera ys. 2c tsneten: 4°5 
Sodtuiie (...0220es 2 49 °5 Strontium ............ 24 °5 
Potassium ............ 40 :O BATA ais thee hel trees 26 °0 
Part TEOn the Solubility of Phenol and certain Crystalline 
Substances in Salt Solutions. 
The theory and discussion of the results recorded. in. this part have been 
already dealt within some detail in Part I. 
Critical Solution Temperature of Phenol and Salt Solutions. 
The compositions of the two phases, phenol and water, were investigated 
in detail many years ago by Rothmund.* It may be recalled that if a 
mixture of the two substances be heated, the phenol phase becomes richer in 
water, and the aqueous phase richer in phenol until a point is reached when the 
system becomes monophasic. The temperature at which this will happen will 
depend upon the readiness with which disaggregation takes place, and should 
consequently be a function of the surface tension at the limiting surfaces of 
* ‘Zeitsch. Physikal. Chem.,’ 1898, vol. 26 p. 433. 
