220 



Table 217. 

 FREEZING MIXTURES.* 



Column I gives the name of the principal refrigerating; substance, A the proportion of that substance, B the propor- 

 tion of a second substance named in the column, C the proportion of a third substance, £> the temperature of the 

 substances before mixture, £ the temperature of the mixture, /^the lowering of temperature, G the temperature 

 when all snow is melted, when snow is used, and // the amount of heat absorbed in heat units (small calories wheu 

 A is grammes). Temperatures are in Centigrade degrees. 



* Compiled from the results of Cailletet and Colardeau, Hammerl, Hanamann, Moritz, Pfanndler, Rudorf. and 

 Tolhnger. 



t Lowest temperature obtained. 

 Smithsonian Tables. 



