EFFECT OF DEFINITE QUANTITIES OF MOISTURE. 37 



(3) In the "dark room" of the botanical laboratory, which was 

 quite dry and maintained at a temperature of 20 to 22 C. 



(4) In the herbarium room on the fourth floor of the botanical labo- 

 ratory. The air here was very dry and the mean temperature about 

 the same as for No. 3, but with a much wider variation, reaching at 

 times a maximum of 30 and a minumum of 10 C. 



(5) In an incubator maintained at 30 to 32 C. 



(6) In an incubator maintained at 37 to 40 C. 



It will be observed that all of the preparations, except Nos. 1 and 4, 

 were kept at temperatures which were quite uniform. The increase 

 or decrease in the weight was determined at the expiration of 70 or 72 

 days by again carefully weighing the seed, after which germination 

 tests were made. The results of the germination tests and the gain or 

 loss in weight are given in Table X. 



