269 



or his own. In his studies, he was equally appreciative of the 

 general and the detailed, and he balanced the two in a way that 

 is very rare among systematists. 



In work of this kind, every conclusion reached becomes the 

 key to other questions, so that the publication of a group always 

 represents the accomplishment of much more than appears in 

 the publication. It is thus true that by far the larger part of 

 Professor Underwood's results are recorded only in the herbarium 

 cases where his annotated specimens are arranged. When one 

 shall appear who is ready and able to take up this work where 

 Professor Underwood has left it, he will find it no light task to 



by bringing himself to a point where he can compass Professor 

 Underwood's view. 



H. H. Rusby. 



THE EVAPORATING POWER OF THE AIR AT THE 

 NEW YORK BOTANICAL GARDEN. 



In May, 1900, three meteorological stations were established 

 in the Garden.* Station 1, located in the herbaceous garden, 

 was equipped with a standard rain-gauge, a thermograph, and a 

 set of maximum and minimum thermometers. Station 2 was on 

 a low ridge in the center of the hemlock forest, and station 3 

 in the central portion of the elevated plain of the fruticetum. 

 The last two stations were equipped with thermographs only. 



Late in September, 1904, these three stations were abandoned, f 

 The catchment basin of the rain-gauge was installed on the roof 

 of the Museum building over the physiological laboratory, and, 

 by means of a lead pipe extending down through one of the sup- 

 porting pillars, it was connected with the gauge at the base of 

 the pillar, inside the laboratory. The amount of precipitation 

 recorded at the new station was found to be approximately the 



