I40 THE CONNECTICUT POMOLOGICAL SOCIETY. 



lar experience in the preparation of this chemically boiled 

 lime-sulphur wash. 



We have developed a new lime-sulphur wash in which sal 

 soda is used to assist in bringing about the chemical combi- 

 nation instead of caustic soda, and in this connection it is only 

 fair to state that we were led to experiment with this material 

 after learning of Dr. Britton's work with sodium sulphide. 

 Our results with sal soda were most gratifying. Several for- 

 mulae were employed and as the outcome of our experiments 

 we have decided to recommend for further experimental work, 

 particularly where small amounts of the wash are to be em- 

 ployed, the same amounts of lime and sulphur mentioned 

 above, namely : 20 lbs. of lime, 75 lbs. of sulphur, and 10 lbs. of 

 sal soda to f,o gals, of zvash. This may be prepared by 

 placing -five or six pails of hot zvater in a zvooden barrel, pre- 

 ferably a thick pork or oil barrel, add the lime, quickly follow- 

 ing that with the sulphur and sal soda and stir actively till the 

 slaking is practically completed. It is usually necessary to 

 add cold water at intervals to keep the mixture from boiling 

 over. After the rapid bubbling or boiling is practically com- 

 pleted, 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 

 wash. 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 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 thoroughly 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 commenced last spring has given 

 as good results in killing the San Jose scale as any of the 

 lime-sulphur washes. It has several advantages. It 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 quantity of caustic soda advised for preparing 50 

 gals, of wash. This material has been used but one season. 



