58 
A series of 264 third generation progenies belonging to nine 
different hybrids was inoculated with the covered smut. These 
involved various combinations of smut resistance in the original 
parental varieties. In the hybrids in which Feterita was one of 
the parents, many blasted plants appeared. These were in strik- 
ing contrast to the hybrids in which the Milos were the resistant 
parents. 
There were 441 fourth generation families of several hybrids 
grown. These were tested to determine the relation of resistance 
and susceptibility in the third generation by observing the 
behavior of the fourth generation. Altogether, 75 fifth genera- 
tion families of the hybrid between Feterita and Sumac Sorgo 
were grown, and additional light on the inheritance of suscepti- 
bility in this hybrid was obtained. 
The loose smut of sorghum was also used in a large number of 
experiments. First generation plants, as well as second, and 
273 fourth generation progenies were inoculated, and extensive 
data on their reaction to the loose smut have been obtained. 
It was possible to carry out these extensive experiments with 
the sorghum smuts through the courtesy of Director H. B. Knapp 
and his associates, State Institute of Applied Agriculture on Long 
Island, Farmingdale, L. I. Approximately one acre of land was 
placed at our disposal, making it possible to grow about 26,000 
plants. The large amount of data accumulated on all these 
sorghum hybrids is being prepared for early publication. 
GRADUATE STUDENTS AND INDEPENDENT INVESTIGATORS 
ENROLLED DURING 1934 
During the past year, Mrs. Marie E. Conklin continued her 
investigations on the bacteria which form tubercles on the wild 
legumes. Her studies involve the problem of the cultural charac- 
teristics of the bacteria isolated from different plants, and also 
their capacity for infecting. She has accumulated a large amount 
of data, and is now preparing her results for publication. 
Dr. Elva Lawton, a member of the Biology Department of 
Hunter College, has continued her studies on regeneration and 
polyploidy in ferns. 
Dr. Frances A. Hallock continued her studies of the morphology 
and relationship of the evergreen shrub Garrya. 
