June, ’24] 
ROBINSON: SKIM MILK EMULSIONS 
397 
may be introduced into the spray tank. Without reporting in detail the 
laboratory experiments a formula is given showing the amounts of in¬ 
gredients that may be used to duplicate the proportions used in self- 
boiled lime-sulfur. 
Sulfur, superfine flour. 8 pounds 
Hydrated Lime. 4 pounds 
Skim milk. 2 quarts 
Water to make.50 gallons 
Preparation. The proper amounts of sulfur and hydrated lime are 
mixed together. An equal amount of water is added to the milk. This is 
then poured onto the sulfur and hydrated lime mixture, stirring mean¬ 
while until a smooth paste is formed, adding more water as needed. 
After stirring to a creamy consistency several gallons of water are 
added, stirred well, and then poured through a strainer into the spray 
tank. Finally the required amount of water is added and the spray is 
ready for application. 
The only precaution to observe is to use the best superfine sulfur or a 
form similar to that employed in dusting sulfurs. The amount of milk 
advised in the formula may be reduced by one-half, but the larger 
quantity is recommended in order to improve the spreading property of 
the spray. Other forms of milk may be substituted for the skim milk, 
such as whole milk, condensed whole or skim milk, or any of the milk 
powders. The amount of condensed milk found satisfactory is about one- 
fourth of the amount given in the formula; the dried product should be 
used at the rate of 2.5 ounces to the quart, or 5 ounces for the above 
formula. Slightly sour milk also may be used, provided it is first neutral¬ 
ized with a little hydrated lime. 
Except when the above formula is to be applied to tender foliage 
there is no advantage in using so much hydrated lime. One-half pound 
of hydrated lime in the above formula should be sufficient to prevent any 
tendency to burn on foliage where summer strength lime-sulfur is used. 
The milk wets the sulfur as easily with .5 pound of hydrated lime as with 
4 pounds of the lime. 
The New Jersey Experiment Station 1 has carried on experiments 
with their “Dry Mix” sulfur-hydrated-lime-calcium-caseinate mixture, 
and has obtained better results in field tests than with any other sulfur 
spray. Equally good results should be obtained with the above formula 
where milk is used. Ifc should likewise give as good or better results than 
are obtained with the commercial wettable sulfurs or the atomic-sulfurs. 
x New Jersey Experiment Station Bulletin 379. 
