130 



OSMOTIC PRESSURE OF AQUEOUS SOLUTIONS. 



been made in the general improvement of the facilities for the main- 

 tenance of temperature; since it is easier, by means of circulating ice 

 water, to maintain a temperature near 0° than to secure a fair degree 

 of constancy by means of regulating devices at any higher temperature. 

 That some progress had been made in the direction of securing 

 constant cell capacity is shown in Table 19, in which the two series are 

 compared with respect to the upward displacement of the manometers. 



Table 19. — Cane sugar, Series II and III. Upward displacements of the manometers(mm.) 



Further evidence of progress in the improvement of the method is 

 to be found in Table 20, in which the losses in rotation of Series II 

 and III are compared. 



The evidence presented in Table 20 relates to the progress which 

 had been made in the effort to suppress dilution from any or all sources, 



