MUSHROOM GROWING 



before the new beds go in. Long before this 

 all remains of the previous crop should have 

 been removed from the vicinity. In prepa- 

 ration for the fumigation, thoroughly clean 

 and sweep the houses, spray with water one 

 or two days in advance, to insure a moist 

 condition, and select preferably damp 

 weather. Also make the house as air-tight 

 as possible, pasting paper over all cracks. 



For every i,ooo cubic feet of space allow 

 three pints of commercial formalin (40 per 

 cent, formaldehyde) and i)^ pounds of per- 

 manganate of potash. Vessels to contain 

 the fumigation materials are required, and 

 for relatively large quantities these may be 

 such as tubs, or very large earthenware con- 

 tainers. When the houses are over 50 feet 

 long two or more containers are needed. 

 Prepare the amounts of the materials with 

 respect to the number of vessels, pour the 

 required amount of formaldehyde into each 

 and weigh the permanganate into paper bags 

 to be placed beside the containers until 

 ready. The formalin will suffice to cover 



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