New York Agricultural Experiment Station. 201 



SUMMARY. 



Although the fumigator was severely tested in two of the more 

 important points in its construction, the danger of leakage and 

 spreading at the base, it proved entirely satisfactory. Heavy 

 charges of sulphur smoke and hydrocyanic acid gas were used 

 to ascertain whether there was any leakage between the felts, 

 but none could be detected. The frame has also remained rigid, 

 there being no indications of spreading at the base or otherwise 

 becoming out of shape. 



In constructing the fumigator, a light but rigid frame should be 

 aimed at and much care should be taken to make the adjustable 

 side a fairly tight fit. The small metal flanges at the bas-e of the 

 frame are also of special importance, as they prevent the door 

 from slipping down and thus allowing the gas to escape at the 

 top. 



