99 
Dr. J. S. KARLING, Professor of Botany at Columbia Univer- 
sity and physiologist of the Tropical Plant Research Foundation, 
Washington, D.C., sailed on May 21 for British Honduras to con- 
tinue his studies and tapping experiments on Achras zapota and 
other gum yielding species. This is the fifth expedition to the 
tropics undertaken jointly by the Tropical Plant Research Foun- 
dation and the Botany Department of Columbia University for 
American gum companies, to investigate the source of chicle and 
the possibility of plantation culture. An experiment station and 
plantation consisting of approximately 45,000 acres has been es- 
tablished at Honey Camp in the Orange Walk District. 
At the University of Michigan, Professor C. H. Kauffman has 
been made Professor Emeritus of Botany and Emeritus Director 
of the University Herbarium. Professor Kauffman has not re- 
covered from the stroke of paralysis which he suffered in Febru- 
ary, 1930. Although he has shown some improvement he is still an 
invalid confined to his bed. Professor E. B. Mains, formerly of 
Purdue University, was appointed last September Professor of 
Botany and Acting Director of the University Herbarium. He be- 
came Director on Professor Kauffman’s retirement in February of 
this year. Dr. William Randolph Taylor came to the University last 
October as Professor of Botany and Curator of Algae in the Uni- 
versity Herbarium. The staff of the Herbarium have been busy 
this past winter working over the collections made on Isle Royal, in 
Lake Superior, last summer. About 2600 cryptogams were collected 
by Dr. A. H. Povah and J. L. Lowe, and 1100 phanerogams and 
ferns by C. A. Brown and J. B. McFarlin. The last named has spent 
the winter in central Florida making a study of the flora of that 
Tegion. Since January, Professor H. H. Bartlett has been in British 
Honduras and Guatemala as the botanist of the party from the 
University Museum working in coöperation with the Carnegie In- 
stitution of Washington with headquarters at Uaxactun. 
