230 



TABLE 248. 

 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, D the temperature of the 

 substances before mixture, E the temperature of the mixture, F the lowering of temperature, G the temperature 

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

 A is grams). Temperatures are in Centigrade degrees. 



To *. Co e m P iled fr m the results of Cailletet and Colardeau, Hammerl, Hanamann, Moritz, Pfanndler, Rudorf, and 



t Lowest temperature obtained. 

 SMITHSONIAN TABLES. 



