196 ANNUAL REPORT OF THE Off. Doc. 



the oyster shell bark louse, although through the winter there is an 

 egg there ins! cad of a living louse, but I find it destroys them just 

 as effectually as it docs the tent caterpillar egg right around the 

 root of a tree. 



MR. McGOWAN: Will a continuance of spraying yearly with the 

 Bordeaux mixture have the effect of destroying the San Jos6 Scale? 



DR. FUNK: It will not. 



A Member: I would like to ask the Doctor whether we cannot 

 use something that is more easily prepared than the lime, sulphur 

 and salt for the scurfy scale. 



DR. FUNK: My men who help to spray say they would rather 

 prepare a spray composed of lime, sulphur and salt than they would 

 the ordinarv Bordeaux mixture, with the conveniences w 7 e have. 

 Everything runs by gravity right in our machines. 



MR. GLOVER: Will ordinary white-wash kill the scurfy scale? 



DR. FUNK: No, so far as actually killing the scale is concerned, 

 it will not do it. I know of instances where trees have been painted, 

 and painted thoroughly with the pure lime wash, but it wall not do it. 



MR. McGOWAN : How much Paris green shall we use for 45 gal- 

 lons of water in the Bordeaux mixture? 



DR. FUNK: I am not using Paris green alone. I am using 

 one quart of the arsenite of soda, a quarter of a pound of Paris green 

 to a hundred gallons. If I was using Paris green alone I would 

 use about three-quarters of a pound to a hundred gallons of Bordeaux 

 mixture. 



MR. J. W. COX : What is the proper way to prepare the Bordeaux 

 mixture? 



DR. FUNK: When I prepare Bordeaux mixture I want to begin 

 ordinarily with three barrels. I want in the one barrel — I am giving 

 it now to make fifty gallons — in one of my outside barrels — I will 

 have three barrels in the lot — in the one outside barrel I will put 

 25 gallons of water. It depends of course, upon what mixture 

 you want to make. In the Bordeaux mixture w r e have Nos. 

 1, 2 and 3. Suppose you want it, say, for potatoes, in wdiich we 

 use six pounds of sulphate of copper. We put it in a bag so that it 

 is merely covered with water. If you throw it right in the boiler 

 it will form a saturated solution and it will not dissolve for a good 

 many hours; then you will take four pounds of lime and you will 

 slack this with hot water, then run this through a strainer into the 

 other outside barrel and add sufficient water to bring that up to 25 

 gallons. Now you have got this in the most diluted form that 



