miscellaneous: tumors in absence of parasites 487 



Fig. 365. — Small tumors on under-gurface of a cauliflower leaf produced by 

 vapor of ammonia water. Exposed for 15 minutes in 10 cubic feet ot air space to 

 0.5 cc. of 0.90 sp. gr. water of ammonia. Photographed after 9 days. X 4. 



