AQUEOUS SOLUTIONS OF CERTAIN SALTS. 

 Calcium Chloridk — CaCl,. 



19 



Volume of bottle to zero mark at 9°'5 = 

 Mass of water in bottle = 2Gb5-8 grm. 

 INIean section of tube = 0'41 sq- cm. 



2()ir,-.5c.c. 



The direct experimental results are contained iu the first and foiivth columns. The 

 strengths of the solutions examined varied from 0191 to 1"32 per cent, of salt iu solution, 

 The fourth and fifth columns shew that, as in the case of the other two salts examined, 

 all the solutions were more bulky than the constituent water. 



The relation between the concentration and the density of these solutions is shewn 

 grajihically in Plate I, the mass of salt per unit mass of water being plotted against 

 density. The result is a curve bending towards the axis of concentrations. In the case 

 of this salt, therefore, the rate of change of density with concentration diminishes with 

 the concentration. 



I am not aware of the existence of any observations with which the above may be 

 compared. Those of SchifF, Kremers, and G-erlach, were all made with solutions of greater 

 streno-th. 



