26 
mended by Mr. A. N. Brown, of Delaware, and this preparation 
undoubtedly kills a considerable proportion of the scale insects upon 
a tree, but the results are not equal to those obtained where a boiled 
wash is employed, and we confess to feeling that in the end it will 
prove unsatisfactory, though we have known of instances where 
very fair results were secured. : 
We have developed a new lime-sulphur wash in which sal soda is 
used to assist in bringing about the chemical combination instead of 
caustic soda. Our results with this were most gratifying. Several 
formule were employed, and as the outcome of our experiments we 
have decided to recommend for further experimental work the same 
amounts of lime and sulphur as before mentioned and 10 pounds of 
sal soda to 50 gallons of wash. This may be prepared by placing 
five or six pails of hot water in a barrel, preferably a thick pork 
or oil barrel, adding the lime, and quickly following that with 
the sulphur and sal soda, and then stirring till the slaking is prac- 
tically completed. It may be necessary to add cold water at inter- 
vals to keep the mixture from boiling over. After the rapid bubbling 
or boiling is practically completed cover the open barrel with burlap 
and allow it to stand thirty minutes or more. A caution regarding 
stirring should be made here, since it seems to affect the composition 
of the mixture. There should be enough agitation to keep the mate- 
rials from caking at the bottom, and yet not so much as to seriously 
hinder the slaking of the lime and accompanying chemical changes. 
This method of preparation gives an excellent compound, so far as 
deep color and little sediment is concerned, provided it is properly 
prepared, and one of the essentials in making it appears to be 
thorough stirring at the outset in order to intimately mix the lime, 
sal soda, and sulphur. A deep red or even pea-green color should 
be secured. This wash sprays nicely, and in experiments com- 
menced last spring has given as good results in killing the San Jose 
scale as any of the lime-sulphur washes. It has several advantages. 
Jt requires no boiling, and the sal soda is a common material, easily 
handled and obtainable in almost every locality. It is also a little 
cheaper, as the amount of sal soda necessary costs less than the quan- 
tity of caustic soda advised for preparing 50 gallons of wash. This 
material has been used but one season, though it was tried in several 
localities. Professor Lochhead, of the Ontario Agricultural Col- 
lege, states that in his hands it was just as successful as other lime- 
sulphur washes, and a few others obtained from good to excellent 
results in spite of their inability to give it a thorough trial. 
In this connection it might be well to add that experiments were 
tried with the caustic soda solution, using about 1 pound to 6 gallons 
of water, and also with a bordeaux mixture to which 2 ounces of cor- 
rosive sublimate were added to each 50 gallons. The results showed 
