APPENDIX 



337 



The solution of ammonic nitrate in an equal weight of water 

 will reduce the temperature of the mixture from about + io° to 



-15°. 



Liquid carbon dioxide and ether will give a temperature of 

 - ioo° C. 



Liquid hydrogen gives a temperature of — 25 2°. 



Liquid air will give a temperature of about — 190 200 ° C. 



Value of i ccm. Fehling's Solution in mg. of Various Sugars. 



Dextrose 



Levulose 



Invert sugar.. 



Galactose 



Milk sugar . . 

 Maltose 



4.753 mg.i 



5.144 



4.941 



5.110 



6.757 



7.780 



5.00 2 



5.00 



4.75 



6.78 

 8.07 



Table Showing Proportional Volumes of Oxygen and Nitrogen in 

 Various Volumes of Air.» 



1 Soxhlet. Sugars in 1 per cent. sol. Fehling solution undiluted. 



2 Allen. Agric. Chem. 1 : 226. 



3 From Bunsen. Gasometrische Methoden. 



23 



