151 
have been much greater. Tat this is the case is evidenced by 
so many shrubs being alive below the snow line, and even in those 
cases where particularly tender shrubs were killed right to the 
ground, the snow undoubtedly prevented their entire destruction 
by protecting the roots. If the damage were the result o 
earlier in the season, before the snow covering was present, this 
would be shown by the killing of the shrubs to the ground; but 
from the fact that most of the damaged shrubs were unharmed 
below the snow Jine, and that the severest weather occurred 
during the presence of this snow, it seems to be clearly indicated 
when the destruction took place. GEORGE V. 
NOTES, NEWS AND COMMENT. 
Professor Hugo de Vries, Director of the Botanical Garden at 
Amsterdam, Holland, was a visitor at the garden from June 9 
to 14, and made an examination of the mutant species now in 
cultivation in the experimental grounds. Professor de Vries re- 
ceived the degree of doctor of science from Columbia University 
at the annual commencement exercises on the ninth. He also 
delivered the dedicatory address at the station for experimental 
evolution at Cold Spring Harbor, on June 11. Professor de 
Vries will remain in America until about October 1, making a 
tour which will include a visit to the Desert Laboratory at Tuc- 
son, Arizona, a course of twenty five lectures at the University of 
California, five lectures at the University of Chicago, and an 
address before the congress of botanists at St. Louis in September. 
Professor F. E. Lloyd, of Teachers College, is at the Desert 
Botanical oe where he is engaged in some special in- 
vestigations on the transpiration of desert plants. 
Dr. J. H. Harshberger, of the University of Pennsylvania, 
visited the garden for a few days during June for the purpose of 
consulting the library and the collections of algae 
Professor W. C. Coker, of the University of North Carolina, 
was in residence at the garden during June for the purpose of 
completing some investigations on the flora of the Bahamas. 
