214 



Frederick Guthrie on Salt Solutions 

 Table XXXII. 



Pb2(N0 3 )per 



cent, by weight. 



EL per cent, 

 by weight. 



Temperature 



at which solidi- 

 fication begins. 



Nature of solid. 



5 

 10 

 15 



20 



26-23 



2989 



95 

 90 

 85 



80 



73-77 



7011 



o 



-0-3 

 -0-5 

 -0-7 

 -12 

 -2-5 

 00 



Ice. 



» 



Cryohydrate. 

 Pb2(NO :j ). 



The temperature of the cryogen is — 2°*5. The solutions 

 were analyzed by simple evaporation and gentle heating. 



§ 153. Separation of Ice Sfc. from Solutions of Nitrate of 

 Barium. — As the solution of this salt was found to contain 

 only 5*37 per cent, of the anhydrous salt at 0° C, and as the 

 cryohydrate only contains 5*3 (§ 80), only one intermediate 

 observation on the separation of ice could be got, namely that 

 of the 3-per-cent. solution, which gave up ice at — 0°*4. 



§ 154. Separation of Ice Sfc. from Solutions of Nitrate of 

 Strontium. 



Table XXXIII. 



Sn2(N0 3 )per 

 cent, by weight. 



H 2 per cent, 

 by weight. 



Temperature 

 at which solidi- 

 fication begins. 



Nature of solid. 



5 



10 

 15 

 20 

 26 

 29-62 



95 

 90 

 85 

 80 

 74 

 70-38 



o 



-0*5 

 -12 

 -2-3 



-3-8 

 -6 

 00 



Ice. 



>> 



i> 



n 

 Cryohydrate. 

 Sn2(N0 3 ). 



§ 155. Separation of Ice Sfc. from Solutions of Nitrate of 

 Calcium. 



Table XXXIY. 



Ca2(N0 3 )per 

 cent, by weight. 



H^ O per cent, 

 by weight. 



Temperature 

 at which solidi- 

 fication begins. 



Nature of solid. 



5 



95 



o 



- 11 



Ice. 



10 



90 



- 2-3 





15 



85 



- 4-2 





20 



80 



- 6 5 





25 



75 



- 9-3 





30 



70 



-12 9 



>j 



