1904] Properties of Solutions of Chloroform in Water, etc. 401 



For example, to obtain a dilution of 1*5 per cent., 5 c.c. of 1-per-cent. 

 solution and 5 c.c. of 2-per-cent. solution were drawn off into pipettes, 

 placed in the densimeter and mixed as above described ; to obtain a 

 0'4-per-cent. solution, 6 c.c. of the solvent were taken and 4 c.c. of 

 a 1-per-cent solution, and similarly treated; to obtain a 0"03-per-cent. 

 solution, 7 c.c. of solvent and 3 c.c. of - l-per-cent. solution were taken, 

 and so on. 



Certain of our experiments were carried out at room temperature 

 and others approximately at body temperature (40° C.) ; the following 

 protocols and accompanying curves show some of the typical results 

 obtained, which have been confirmed in most cases by duplicates : — 



Variable Vapour Space. 



Experiment 1. — Distilled water containing approximately 0'78 per 

 cent, of chloroform. Half a cubic centimetre was introduced into 

 each tube of the densimeter, of the chloroform water on one side and 

 of the same distilled water without chloroform on the other. The 

 temperature at which the experiment was carried out was 17° C, 

 and the volume at which readings of pressure were taken varied from 

 2—50 c.c. The percentage of chloroform in the water was not known 

 directly, but was calculated by extrapolation of the curve showing 

 Y.P., see Curve 1, fig. 3. 



Fig. 3. 



i -6 



Pressure in mi \\\ metres cf mercury. — *- m.m. of mercury. 



The following table gives the results of the experiment, which are 

 also shown graphically in Curve 1, fig. 3, in which the abscissae show 



