i 56 Collective View of all the Frigorific Mixtures, &c< 



Table Iir, 



This Table consists of frigorific mixtures selected from the 

 foregoing tables, and combined, so as to increase or extend 

 cold to the extremest degrees. 



Combinations of Frigorific Mixtures. 





Mixtures. 



Thermometer sinks. 



. 



Degrees oftOid 

 producid. 





Phosphate of soda . . . 

 Nitrate of ammonia . . 

 Diluted nitric acid .... 



5 parts 



3 



4 



From 0° to — 34° 



34 





Phosphate of soda . . . 

 Nitrate of ammonia .. 

 Diluted mixed acids . . 



3 parts 

 



4 



From — 34° to —50° 



16 





Snow 



3 parts 

 



From 0° to — 46 



46 





Diluted nitric acid .. . 





Diluted sulphuric acid 

 Diluted nitric acid . . . 



8 parts 



if 



1 part 

 1 



From — 10° to — 56° 



46 





From — 20° to — 60° 



40 





Diluted sulphuric acid 





Snow 



3 parts 

 4 



From + 20° to — 48° 



68 











3 parts 

 4 



From+ iO°to — 54°. 



64 







2 parts 

 3 



From— 15° to — 68° 



53 









Cryst. muriate of lime 



1 part ■ 

 "2 



From 0° to — 6G a 



66 





Cryst. muriate of lime 



1 part 

 3 



From — 40° to — 75° 



33 





Diluted sulphuric acid 



8 parts 

 10 



From — 68° to — 91" 



23 



N.B. The materials in the first column are to be cooled, 

 previously to mixing, to the temperature required, by mix- 

 tures taken from either of the preceding tables. 



XXXI. Ab- 



