New York AgricuurturaAL EXpeRIMENT Station. 861 
(2) What proportions of sulphur and lime and water give the 
largest amount of soluble sulphur in the form of sulphides of 
calcium? (3) How is the amount of soluble sulphide sulphur 
influenced by heating the mixture under different conditions, 
such as length of time, degree of temperature, etc.? (4) Why is 
it that home-made preparations contain less sulphur in solution 
than the best commercial preparations? (5) Does the purity of 
the lime used affect the amount of soluble sulphide sulphur? 
(6) When a concentrated solution is diluted and mixed with 
lime, is the amount of soluble sulphide sulphur affected? 
(7) Can the undissolved portion remaining after making the 
lime-sulphur mixture be used again? 
In presenting the results of our investigation, we shall con- 
sider, in most cases, the following points: (1) Specific gravity 
or density (including degrees Beaumé). (2) Amount of solu- 
tion and of sediment. (3) Color of solution and of sediment. 
(4) Composition of solution in respect to calcium and differ- 
ent forms of sulphur compounds. (5) Composition of sedi- 
ment in respect to calcium, magnesium and different forms of 
sulphur. 
EXPERIMENTS WITH DIFFERENT FORMULAS. 
After some preliminary experiments, it was decided to use 
varying amounts of lime for a given amount of sulphur. The 
special object was to ascertain what proportions of lime and 
sulphur, other conditions being the same, would give the 
largest amount of calcium sulphides in solution and especially 
the largest amount of calcium pentasulphide (CaS,;). These 
experiments were performed in the laboratory on a compara- 
tively small scale; but large quantities were made later to test 
the results of the laboratory experiments and these experi- 
ments on a large scale will be described by the Station Ento- 
mologist in another bulletin. 
The following proportions of lime and sulphur were used: 
(1) Sulphur, 125 pounds, lime, 52 pounds; (2) sulphur, 125 
pounds, lime, 60 pounds; (3) sulphur, 125 pounds, lime, 65 
pounds. 
