1919] 



on Liquid Oxygen in Warfare 



(U!) 



These rough vahies are sufficient to indicate that the method is 

 capable of yielding considerable information on emissivity prolAems 

 at low temperature. 



With metal containers of a uniform pattern, the relative efficiency 

 in conserving their liquid air contents falls off very much as the 

 capacity is reduced. This is seen by the comparison of the percentage 



25 



DAYS 

 OF LIFE 



20- 



15 



10 



Life" of 30 Gallons of Liquid Air 



When Stored in Containers of 



Increasing Size 



/ 



I4i^2 DAYS. 



^Gallon Vessels 

 5^4 Days; 



>i Gallon Vessels; 

 3 days 



Gallon Vessels; 



Gallon Vessels; 

 20 Days. 



> 



30 



Gallon Vessel 

 22 Days 



'52025 LITRES Capacity of Container 



5 Gallons 

 I Gallon 



Fig. 18. 



10 



4^2 Kilos 



15 



losses (4tli column) for vessels 3, 4 and 5, and is further illustrated 

 by the curve of Fig. 18, which shows the relation between the time 

 taken for 30 gallons of liquid air to disappear by evaporation and 

 the size of container employed to store such a quantity. The standard 

 of efficiency assumed for this purpose is the low^ average of ordinary 

 commercial vessels, and could be materially improved. From this 



