New York Agricultural Experiment Station. 223 



Table I shows the results of the cultures made from sclerotia taken 

 from untreated tubers and tubers subjected to the formaldehyde gas 

 treatment. Unless otherwise stated, the quantities of the chemicals 

 used in the fumigator are 14.25 grams of potassium permanganate 

 and 30 cubic centimeters of formalin, which is equal to 23 ounces of 

 the salt and 3 pints of the liquid for every 1000 cubic feet of space. 

 The exposure was usually for 24 hours and any change in exposure 

 is noted. Where the quantity is expressed in pounds, it is to indi- 

 cate the number of pounds of tubers per cubic foot of space in the 

 fumigator; otherwise, the number given shows the total number of 

 tubers exposed at one charge. As each experiment is numbered, the 

 condition of the potatoes before they went into the fumigator and 

 the effect of the gas upon them can be readily learned by referring 

 to the corresponding experiments in Tables I and II, Bulletin No. 

 369. The data an regard to the efficiency of the gas treatment are 

 summarized in Table II of the present bulletin; while Table III 

 shows the results of experiments in which the liquid treatment 

 was used. 



