Eb'FECT OF DEFINITK QUANTITIES OF MOISTURE. 37 



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

 quite dry and maintained at a tomporaturo of L>n to 22 C. 



(-t) In tlu^ horl)ariiim room on the fourth floor of tho botanical labo- 

 ratory. I'hc air hero 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 minunuim of 10° C. 



(5) In an incubator luaintained 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 7»» or 72 

 days l)y 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. 



