106 



Frederick Guthrie on Salt-Solutions 

 Table L. 



Chloride 



Water 

 per cent, 

 by weight. 



Temperature 





of aniline 



at which 



Nature of 



per cent, 

 by weight. 



solidification 

 begins. 



solid. 



1 



99 



- 2C. 



Ice. 



4 



96 



- 1-0 





5 



95 



- 1-3 





6 



94 



- 1-6 





7 



93 



- 1-9 





8 



92 



- 2-2 





9 



91 



- 2-5 





10 



90 



- 2-8 



,, 



11 



89 



- 30 



„ 



12 



88 



- 3-3 



_ 



13 



87 



- 3 6 





20 



80 



- 5-7 



tt 



25 



75 



- 7-2 



SJ 



30 



70 



- 90 





31-86 



68-14 



-10-7 



Cryohydrate. 



35 



65 



- 8-0 



Salt. 



4035 



59-65 







>} 



4672 



53-28 



+13-1 





The curve corresponding to the above table is shown in fig. 2. 

 § 244. Nitrate of Aniline. — As a cryogen, the temperature 

 — 2°*2 was obtained. A solution saturated at 13°*1 was eva- 

 porated in vacuo over sulphuric acid until it ceased to lose 

 weight ; 7*5174 grams gave 1*1710 gram dry salt, or 15*58 per 

 cent. 8*6860 grams of solution saturated at 0° gave 0*9500 

 gram, or 10*94 per cent. A dilute solution reached, in a 

 freezing-mixture, the constant temperature of — 2°*2. Of 

 this, the cryohydrate, 7*7972 grams gave 0'8270 gram dry 

 salt, or 10*61 per cent. The nitrate cannot be dried in a 

 water-bath without suffering partial decomposition. The 

 above results are embodied in the following table, which also 

 shows the temperatures of initial solidification. 



Table LI. 



Nitrate 





Temperature 





of aniline 



per cent, 

 by weight. 



at which 



Nature of 



per cent. 

 by weight. 



solidification 

 begins. 



solid. 



2 



98 



- 04 



Ice. 



4 



96 



- 0-8 





6 



94 



- 11 



)t 



8 



92 



- 15 



,, 



10 



90 



- 2 



)( 



10-61 



89-39 



— 22 



Cryohydrate. 



10-94 



89 06 







Salt. 



15-58 



84-42 



4-131 



» 



Fig. 2 shows the curve representing the above numbe 



