and At tad led Wat 



er. 



Ml 



Table XVIII. 



KN0 3 



per cent, by 

 weight. 



| 



H 2 



per cent, by 

 weight. 



Temperature 

 Centigrade at 

 which solidifi- 

 cation begins. 



Nature of 

 solid. 





99 



-8l 



Ice; 



2 



98 



-03 





3 



97 



-0-7 



,, 



4 



96 



-11 



5 



5 



95 



-1-5 



,, 



7 



93 



-2-2 



M 



8-5 



915 



-2-6 





10 



90 



-29 



,, 



112 



88-8 



-30 



Cryohydrate*. 



12 



88 



00 



KN0 3 . 



13 



X7 



+ 2-0 





15 



85 



+6-0 



,, 



20 



80 



4- 140 



,, 



25 



75 



+21-0 



M 



35 



65 



+35 



)> 



40 



60 



-j-41 



» 



The composition at 0° C. was derived from the analysis by 

 evaporation of 11*8050 grms., which gave 1*4166 of KN0 3 , or 

 12 per cent. (Gray-Lussac found ll'fiS). 



§ 130. Separation of Ice and Hydrate of CaCl 2 from solu- 

 tions of that salt. — Although troublesome to manipulate, I pre- 

 ferred to make the solutions by weighing the anhydrous chloride. 



Table XIX. 



CaCl 2 

 per cent, by 



H 2 



per cent, by 



Temperature 

 at which soli- 



Nature of solid. 



weight. 



weight. 



begins. 





1 



99 





 0-2 



Ice. 



2 



98 



0-5 





3 



97 



M 





4 



96 



1-6 





5 



95 



21 





7 



93 



33 





10 



90 



55 





15 



85 



105 





20 



80 



17 5 





-28 



72 



275 



Cryohydrate. 



36-45 



735 



37 



Unknown hydrate. 



39 



61 







CaCl 2 +6H 0. 



45 (Gerlach) 



55 



15-5 



if 



.:.* I have adopted the temperature —3°, after a long series of experiments, 

 instead of — 2 o: 6 ; which is given in Table X. 



