370 
R. C. WRIGHT 
When it is desired to analyze a sample of air from a container, such as a 
barrel or box, attach a bulb at G as usual, then connect the intake end of the 
bulb with a tube through which air from the container may be pumped, 
or attach a rubber tube at G through which air may be drawn from the 
container by placing the mouth over the funnel F, taking precautions to 
wash off all sodium hydroxide from about the sides of the funnel. 
When operating the apparatus gloves should be worn and it should not 
be held close to the body, as the heat will expand the air within and true 
results will not be obtained. 
Bureau of Markets, 
U. S. Department of Agriculture 
