(21) 



printed in other periodicals ; these have been consecutively 

 numbered and many of them have been distributed to our cor- 

 respondents ; most of the pamphlets and books received by 

 members of the staff in exchange with other investigators 

 have been turned into the Garden Library, and this is an im- 

 portant means of keeping the library supplied, without cost, 

 with the recently-published papers of many botanists. 



Meteorological Observations. 



Meteorological Stations were established on April ist at 

 (i) Herbaceous Garden, where a raingauge, maximum and 

 minimum thermometers, and a thermograph were installed ; 

 (2) in the Hemlock Forest, a thermograph ; (3) Fruticetum, 

 a thermograph. Station 3, which was established for com- 

 parison with Station 1 was abandoned after six months. 

 The principal data obtained have been published monthly in 

 the Journal. The thermometric apparatus was housed in 

 standard instrument shelters, U. S. Weather Bureau pattern. 



Thermometers, hygrometers and thermographs have been 

 used continuously in the conservatories and propagating 

 houses, and their records tabulated. 



Investigations. 



Although but a few months have elapsed since the labora- 

 tories, library, and collections have been accessible and fully 

 open for use, yet a number of researches have been brought 

 to a successful termination and the results described in pub- 

 lications of the Garden, or other periodicals. 



Some of these investigations were begun elsewhere and 

 finished in the Garden, but many of them were carried for- 

 ward from their inception upon material furnished by the 

 Garden, and by the aid of its other facilities. 



The accumulation of living material in the conservatories, 

 and the completion of the propagating houses furnish the 

 widest opportunity for cultural tests of all kinds, and place at 

 our command the means for experimental work upon all of 

 the more important questions in botany. 



Professor L. M. Underwood, of Columbia University, has 



