CANE SUGAR. 



133 



the variations in bath temperature, which ranged between 0.2° and 0.9°. 

 The principal difficulty, however, was due to the fluctuating external tem- 

 perature conditions, which, at that time, were not under good control. 

 The observed osmotic pressures are given, in the customary form, 

 in Table 22. 



Table 22. — Cane sugar, Series IV. Extreme bath temperatures; losses in rotation; observed 

 osmotic pressures; calculated gas pressures of the solute. 



Table 23. — Cane sugar, Series II and IV. Fluctuations in bath temperature. 



The variations in bath temperature were greater in Series IV than 

 in Series III. But since circulating ice water, whose temperature is 

 more constant than that of hydrant water, was used in the latter, it 

 is fairer to compare Series IV with Series II, if with any other, in order 

 to ascertain whether any substantial progress had been made in bath 



