WHAT THE EXPERIMENT 
STATIONS and OTHERS SAY: 
U. S. DEPT. OF AGRICULTURE — “Treating seed 
grain for the control of certain smuts and other diseases 
is a standard recommended practice. It improves yield 
and quality . . . This treatment (Improved Ceresan) 
has the advantage of being applicable to wheat, oats, 
and barley, is easily applied, does not cake in the drill, 
and is non-corrosive to drill parts.” 
CANADA —“New Improved Ceresan, an organic 
mercury dust, was effective in controlling bunt of 
wheat, covered smut of barley, and the smuts of oats.” 
ILLINOIS— “A new product, ethyl-mercury-phosphate, 
tested for one year . . ., promises to control oats smut 
more cheaply than materials heretofore used.” 
IOWA —“It ( New Improved Ceresan) apparently is 
satisfactory to use on barley for the control of covered 
smut, stripe and seedling blights.” 
KANSAS —“The work done on seed treatment for the 
control of bunt indicates ... a new compound, called 
New Improved Ceresan, is also very effective.” 
MICHIGAN — “Where stripe was present, Ceresan 
treatment gave almost 100% control.” 
MINNESOTA —“New Improved Ceresan ... is the 
most generally useful, because it eliminates the stinking 
smut of wheat, the covered smut, and false loose smut 
of barley, barley stripe, and the smuts of oats.” 
MISSOURI —“One of the best chemical materials for 
treating barley seed is a dust sold under the trade name 
Ceresan.” 
NEBRASKA FARMER— “The use of a new improved 
commercial mercury dust containing ethyl mercury 
phosphate is practical for treating all small grains and 
sorghums for smut.” 
NORTH DAKOTA —“New Improved Ceresan ... is 
an efficient disinfectant for smuts (covered smuts of 
wheat and barley, barley stripe disease, and oat smuts).” 
The N. D. Seed Journal—“We recommend the new 
Ceresan treatment very highly, especially when large 
quantities of seed are to be treated . . 
OREGON —“Tests of several of these mercury com¬ 
pounds have been made . . . with effective results in 
the control of smut on oats and barley. The material 
commonly available now is an ethyl mercury phosphate 
dust.” ( New Improved Ceresan.) 
