1908] 



on 



Ice and its Natural History. 



253 



the composition of a block of ice of any weight or volume, which 

 contains, diffused through it, the constant quantity 1*5105 gram 

 NaCl. The results of such a calculation are given in Table 11. for 

 a block of ice having the volume 1000 c.c. at 0", the salt being 

 supposed inert. 



Table I. 



Table II.— 1000 c.c. Ice + 1-5105 Gram NaCl. 



Proceeding by steps in this way we obtain the numbers to be 

 found under tj in Table II. In it V [- V^ (1 + 0-00016 t)] repre- 

 sents the volume of pure ice at t, the salt being inert ; v, iv and c have 



