Vries, Huco DE. AfLmographie der Zwangsdrehungen. Berlin, 1891. 
Vries, Huco pe. Untersuchungen iiber die Mechanischen ks der Zells- 
eee ee ig, 1877. 
War , THOMAS. Observations on Modern Gardening. Ed. 4. London, 
» Max. Die Bastardbefruchtung im Pflanzenreich erliutert an den 
pee dee Weiden, Breslau, 1865. 
ee he Parasitenkunde. Vols. 1-4. Jena, 1869-75. 4 vols. (Given 
by Dr. C. m Ende. ) 
DEATH OF DR. TIMOTHY F. ALLEN. 
The death of Dr. Allen, on December 5th, at the age of sixty- 
five, removed one of the few remaining of the older botanists of 
the city, and one whose advice has been constantly sought by the 
the most important contributors. He subsequently took up the 
study of water plants, and later restricted his researches almost 
wholly to the peculiar and interesting group of Stoneworts, or 
Chara family, which inhabits fresh-water ponds and pools nearly 
all over the world; in search of these plants he personally ex- 
plored a very large part of the United States, and he employed 
collectors to obtain them for him in both North and South 
America and Asia, and by exchanges of duplicate specimens with 
European students, gradually brought together one of the largest 
herbaria of these plants ever formed ; this he presented to the 
New York Botanical Garden early in 1891, and for some months 
was a frequent visitor at the Museum Building, continuing his 
studies and arrangement of these specimens, and pursued this 
work until failing health rendered it impossible. He has also 
contributed many books to the Library of the Garden, of which 
e was one of the original incorporators. 
