102 BOTANICAL GAZETTE [FEBRUARY 
sulphur in the rain water will vary with the rainfall and the near- 
ness to cities where large amounts of soft coal are used. It is 
possible that, in some places under certain conditions, the amount 
of sulphur brought down in the rain water will equal or exceed that 
lost in the drainage, but that in other places and under other con- 
ditions the loss will exceed the gain. Field experiments are needed 
to see whether the plants will respond to sulphur fertilization under 
field conditions. Remarkable responses were obtained by JUDGE 
PETERS, JOHN BINNS, and EpMuND RUFFIN in the Eastern United 
States (CROCKER, 15), and have recently been obtained on the 
Pacific Coast by Rermer and Tartar (58) in Oregon, and by 
OLson (54) in Washington. To secure further information along 
this line, cooperative experiments were conducted on some farms 
in Indiana and Kentucky from which some of the samples reported 
in table I were taken. 
COOPERATIVE FIELD EXPERIMENTS WITH GYPSUM 
The field experiments were conducted in cooperation with the 
farm owners. The farm owners were to apply gypsum and report 
on the effect on yields, if any. Some of the farmers failed to make 
any report, and those who did gave no weights, so that the results 
are not as satisfactory as could be desired. Results reported are 
as follows. 
In the Indiana experiments, gypsum was applied to alfalfa, red 
clover, and tobacco. The only report received was with regard to 
the tobacco. This tobacco field was on the farm of Mr. Ross, 
southwest of Charlestown, Indiana. This is the field from which 
sample 12 was taken, and, as shown in tables I and III, is low in 
sulphur and high in phosphorus. Mr. Ross reports a marked 
increase in yield of tobacco from the use of gypsum on this field, 
but gives no quantitative data. 
Gypsum was applied to alfalfa, red clover, sweet clover, and 
tobacco in Mason County, Kentucky. The crops were injured so 
badly by weather conditions, however, that no results were obtained. 
In Mercer County, Kentucky, gypsum was applied to tobacco, 
clover, and alfalfa. Of the farmers responding, Mr. SHarp reported 
no increase in tobacco, while Mr. FowLER reported an increase in 
