4] 
tures of 20, 22.5 and 25° infections were higher in the sucrose 
solution series when the moisture content of the sand was low, 
but higher in the water series when the moisture content of the 
sand was high. 
The resistant variety Dwarf Yellow Milo was used through- 
out both the series of experiments, but no infected plants were 
observed. 
The effect of an unusually heavy inoculation of chlamydospores 
of covered kernel smut upon infection was also tested. Three 
sets of inoculated seeds were grown, one dusted with the usual 
number of spores, somewhat more than would actually cling to 
the seeds, the second dusted with sufficient spores to make a 
layer of smut over the seeds when planted, and the third set 
with the usual number of spores of covered kernel smut, and a 
surplus of viable spores of loose smut of oats, Usttlago avenae. 
The third set had about the same quantity of spores over the 
seed as in the second set. The heavy inoculation with covered 
kernel smut lessened the percentages of infection obtained, except 
when the moisture content was very low. The addition of the 
spores of U. avenae brought about a very marked decrease in the 
percentage of infected plants. 
The measurement of the height of week old, both inoculated 
and uninoculated seedlings, was taken. 16,200 seedlings were 
measured, half of which were germinated in water and the rest 
in the sucrose solution. It was found that seedlings, whether 
inoculated or uninoculated, were somewhat shorter when germi- 
nated in sand moistened with the sucrose solution than when 
germinated in the water moistened sand. 
THe Tris 
By GEORGE MM. REED 
Farningdale Iris Garden 
In the Brooklyn Botanic Garden ReEcorbD for April, 1936, an 
account of the Farmingdale Iris Garden was given. This garden 
is a cooperative development between the State Institute of 
Applied Agriculture on Long Island and the Brooklyn Botanic 
Garden. The iris species and varieties have been furnished by 
