TABLE F. 



25 cc. of the concentrated Lime-sulphur solution was diluted tn 1000 cc. 

 by the addition of water after the following were added:- 



The results in Experiment No. 6, as found in Table F. shows that at the 

 dilution of one to forty the largest loss of sulphur was when the slightly al- 

 kaline Lead Arsenate and the alkaline Nico-fume were used; and when the 

 slightly alkaline Lead Arsenale and Nico-sul solution were used, showing that it is 

 just as bad to have an alkaline solution as an acid solution, because the alkaline 

 replaces the lime due to it being stronger base, and the lime forms the sedi- 

 ment with some of the sulphur that was combined with the Calcium forming 

 the Calcium pentasulphide (CaS5 ) which is very unstable. As the other re- 

 sults show, to have the best results a neutral solution of a Nicotine compound 

 and an exactly neutral Lead Arsenate should be used with the dilute Lime- 

 sulphur solution for the control of the San Jose scale, Red Bugs, etc. with one 

 spraying. There may be some slight variations in results but the most of them 

 support this conclusion. 



In some evperimental work performed by Mr. Wallace of the Department 

 of Plant Pathology, it was observed that some lime-sulphur solutions diluted 

 one to thirty and saturated with carbon dioxide before being applied to the 

 trees was effective for certain troubles and caused no leaf injury. When, how- 

 ever, there was added to the Lime-sulphur solution lead arsenate, at the rate 

 of four pounds to one hundred gallons, there ivas caused some black precipi- 

 tate, and the mixture then precipitated with carbon dioxide there was consid- 

 erable leaf injury. Some trees were nearly completely defoliated. The lead 

 arsenate of the same brand as used above, when sprayed alone with water 

 caused slight injury. Lead arsenate mixed with Lime-sulphur solution as 

 above, but without any connection of carbon dioxide showed a slight injury, 

 but only after a period of about one month. 



