200 
pean herbaria on October 1. Visits were made to the herbaria 
at Kew, British Museum, Lund, Upsala, Copenhagen, Paris and 
elsewhere for the purpose of studying types of algae. A large 
number of photographs and notes on critical forms were secured. 
Professor Hugo de Vries, Director of the Botanical Garden at 
Amsterdam, and Professor of Botany in the University of Am- 
sterdam, was a visitor at the Garden during the last week of Sep- 
tember, and sailed for Holland on October 5. Professor de Vries 
arrived in America early in June and during the summer has 
delivered lectures on the origin of species at the Station for Ex- 
perimental Evolution at Cold Spring Harbor, L. I., at the Uni- 
versity of California, the University of Chicago, at the Inter- 
national Congress . Arts and Sciences, at the Louisiana Purchase 
mae and at the New York Botanical Garden. Visits 
re made t ae number of institutions, and personal con- 
oe were held with workers interested in evolution and breed- 
ing experiments. 
e lectures given by Professor de hes at the University of 
California are being edited by Dr. D. T. MacDougal and will 
appear in a volume to be entitled « ae and Varieties; Their 
Origin by Mutation,” to be published by the Open Court Pub- 
lishing Co., of Chi 
The total pesptation in the Garden during September, 1904, 
amounted to 4.06 inches. Maximum temperatures of 83° on the 
4th, 83° on ra 8th, 85° on the 18th, and 87° on the 24th were 
recorded ; also minima of 46.5° on the 7th, 44° on the 16th, 
31.5° on the 21st, and 34° on the 22d. 
