MANAGEMENT OF THE FORCING-HOUSE. 



uous watching was necessary to prevent the material 

 from taking fire, for if this should occur it would prove 

 almost instantly fatal to all the plants which might be 

 reached by the gas. The difficulty was in a great measure 

 overcome by L. C. Corbett, at that time 

 an assistant at Cornell, who suggested the 

 use of a sand-bath as a means of modifying 

 the intensity of the heat. Our present out- 

 fit is shown in Fig. 31. It consists of two 

 pans placed on an ordinary hand oil-stove. 

 The lower pan is half filled with clean, 

 coarse sand, and the upper one contains the 

 sulphur. By its proper use our houses have 

 been kept remarkably free from mildew, 

 very adverse circumstances. But there is 

 constant danger that the sulphur will become heated to 

 the burning point, and then the entire stock of plants in 

 the house is lost. This use of sulphur is often very con- 

 venient, but the work should be placed in the hands of 

 a most trustworthy person. If a house should be thor- 

 oughly treated in this manner every week or two, scarcely 

 any mildew could develop. 



even under 



