Density, and Temperature of Salt Solutions. 289 



18 cm. in vessel B. Discharge from the latter vessel took 

 place through a glass tube of small bore and 71*5 cm. in 

 length. After the completion of the experiments, the 

 diameter of the tube was ascertained by breaking it up into 



Fig, 1, 



pieces varying from 2 cm. to 3 cm. in length and measuring 

 the diameters by means of a microscope furnished with 

 micrometer eyepieces. The mean of these results gave 

 '2590 cm. as the tube diameter, In calculating the vis-? 



1-5V 2 

 cosities the value — s — was subtracted from the measured 



head. 2( J 



The relationship between the percentage of salt in the 



solution and its density was measured by means of a Mohr 



specific gravity balance, with the following results in the 



case of sodium chloride :— -» 



Temperature = 60° F. 



Percentage Solution. 



Specific Gravity. 







6 



. 12 



18 



24 



28 



1-000 

 1-042 

 1*088 



ri34 



1-165 

 1-198 



Note. — Percentages reckoned as parts of salt in 100 parts o( solution. 



Phil Mag, S. 6. Vol, 27. No. 158. Feb. 1914. U 



