270 



Table 249 



FREEZING MIXTURES * 



Column 1 gives the name of the principal refrigerating substance, A the proportion of that substance, B the proper, 

 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. 



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

 Tollinger. 



t Lowest temperature obtained. 



Smithsonian Tables. 



