New York Agricultural Experiment Station. 197 



of potatoes for 24 hours with the gas from 25 cubic centimeters of 

 formaldehyde solution. That is, the quantity of potatoes was 3.7 

 lbs. per cubic foot and the quantity of formaldehyde solution more 

 than twice the standard quantity. It may be that their failure to 

 observe any injurious effect of the treatment was due to the tubers 

 being planted before the injury manifested itself. If unsprouted 

 tubers were used there may have been only lenticel spotting, with- 

 out eye injury, and the germination may not have been materially 

 affected. 



In an attempt to duplicate their experiments we made Experiments 

 87-89. (See Table II.) Calculated for our fumigator, containing 

 21.56 cubic feet, the equivalent quantities of formaldehyde and potas- 

 sium permanganate would be 65.75 cubic centimeters of the former 

 and 24.65 grams of the latter. These quantities were used. Experi- 

 ments 87 and 88 were made in the latter part of September with 

 freshly-dug tubers. The varieties Irish Cobbler and Green Mountain 

 were used in Experiment 87 and Sir Walter Raleigh and Gold Coin 

 in Experiment 88. Experiment 89 was made in November with 

 the varieties Sir Walter Raleigh and Rural New Yorker No. 2. 

 Considerable leakage of gas occurred on Experiment 89. In all 

 three of these experiments there was severe lenticel spotting but 

 no eye injury. 



The conditions under which the Vermont experiments were made 

 appear to have been comparable, also, to those in our Experiment 

 78 (See Table II) in which the tubers showed considerable lenticel 

 spotting and much eye injury. 



