14 



B.C. EXTOJIOLOGICAL SOCIETY. 



(11.) Lime-suli5hur 17.5 cc. 



Soap-water at (be r.ite 

 of 1 lb. soap to 100 

 gallons of water . . . .482.5 cc. 



green, and one can hardly see the reason. A 

 close examination will show that there are 

 present such finely divided particles of some 

 green material as to fill the liquid and give 

 the dark appearance. Later these form into 

 larger flocculent masses and settle to the 

 bottom. The liquid is then a dark green. 

 The colour is given by many particles of 

 suspended unlinown material. 

 June 1st. Many very minute crystals of sulphur 

 have collected on the side of the bottle. The 

 hlacli precipitate from the Black Leaf 40 still 

 present and settled. 



May 29'th. Combined these materials to get 

 data on results and to no'te any decomposition 

 that might take place. The resultant solution 

 was similar to thai of dilute lime-sulphur of 

 an equal strength. However, the soap imme- 

 diately coagulated and formed a flocculent 

 mass which settled to the bottom of the flask. 

 This shows that soap-water and lime-sulphur 

 cannot be combined for spraying purposes. 



.June 1st. Same as above. 



AppVications made June IGfh, 1013. 



E.-!. No 



(1.) Arsenate of lead (acid) 8 lb. to 100 gallou.s water. 



(2.) Arsenate of lead (acid) 4 III. to 100 



(.3.) Arsenate of lead (acid) 2 lb. to 100 



(4.) Arsenate of lead (uon-acid) ..^ 11). to 100 



(.o.) Arsenate of lead (non-acid i . .4 lb. to 100 



(G.) Arsenate of lead (non-acid) . .2 lb. to 100 



(7.) Arsenite of zinc 8 11). to 100 



(8.) Arsenite of zinc 4 lb. to 100 



(9.) Arsenite of zinc 2 lb. to 100 



(10.) Arsenate of lead (acid) 8 lb. to 100 j 



(11.) Arsenate of lead (acid) 4 lb. to 100 { 



gallons water. 



jallous water. 



gallons water. 



gallons water. 



'allons water. 



gallons water. 



gallons water. 



gallons water. 



;allons lime-sulpUnr 1-30. 



;allons lime-sulphur 1-30. 



(12.) Arsenate of lead (acid) 2 lb. to 100 gallons lime-sulphur 1-30. 



(1.3.) Arsenate of lead (non-acid) ..8 lb. to 100 gallons lime-sulphur 1-30. 



(14.) Arsenate of lead (non-acid) ..4 lb. to 100 gallons lime-sulphur 1-30. 



(1.5.) Arsenate of lead (non-acid) . .2 lb. to 1(X» gallons lime-sulphur 1-30. 



(16.) Arsenite of zinc 8 lb. to 100 gallons lime-sulphur 1-30. 



(17.) Arsenite of zinc -1 lb. to 100 gallons lime-sulphur 1-30. 



(IS.) Arsenite of zinc 2 lli. to 100 gallons lime-sulphur 1-30. 



(19.) Water w-ithout chemicals. 



(20.) .Lime-sulphur 30.5° Be. 1-30. 



These trees had not been previously sprayed, and the leaves were more or less 

 aftected with scab. The orchard bad only been cultivated once, and therefore was 

 In prime shape to give results in an experiment of this kind. 



The two days following the application were more or less cloudy, and the week 

 following varied from rain to sunshine, mostly rain. 



Summani of Results. 



Lime-sulpbiir -1- arsenite of zinc, lime-sulphur -f arsenate of lead (acid), and 

 lime-sulphur + arsenate of lead (uon-acid) in all strengths caused serious burning. 

 If anything, the non-acid injury was slightly the worst. 



Lime-sulphur caused considerable injury, but not one-half as much as in the 

 combination sprays. 



Arsenite of zinc alone and in all strengths caused some injury. The injury 

 w-as different, however, from that of the combination and lime-sulphur sprayed trees. 



