60 INSECTICIDES AND FUNGICIDES. 



[Serial No. 2, I & W.] 



Following is the synthesis of the insecticide, which we have been as careful as 

 possible not to deviate from in compounding: 



Per cent. 



Nicotine 39 



Camphor 23 



Glycerin 10 



Alcohol 28 



EASTERN CHEMICAL Co. 



Comment by chemist: The best method available for determining 

 camphor gives very low results, but we are sure that our nicotine figure 

 is correct for the sample examined. 



[Serial No. 19530. J 



We have the report on sample 19530, and would say that while we have always 

 been aware that the powder in question was colored, there being a demand for this 

 grade, we had no idea the quality is not of the best. 



Z. D. GILMAN. 



[Serial No. 20456.] 



I notice the large amount of moisture. The original soap, which was an experi- 

 ment, had about this amount, and the soap that I have been sending out for a long 

 time should have less. 



JAMES GOOD. 



[Serial No. 19690.] 



One-thirteenth part of the total weight of Grape Dust consists of tobacco. 



BEN.T. HAMMOND. 



Comment by chemist: Another sample of Grape Dust was obtained 

 directly from the manufacturer and analyzed. It was found to contain 

 about the same amounts of sand, copper oxid, and gypsum as the pre- 

 vious sample, but the sulphur figure was 52.82 per cent and the tobacco 

 figure 8 per cent. 



[Serial No. 19681.] 



Scrofularia consists of pyrethrum, napthalene, tobacco, camphor, and about 0.1 

 per cent oil of cedar oil. We never put in any lead chromate at all. 



BENJ. HAMMOND. 



Comment by chemist: In the sample of Scrofularia examined in this 

 laboratory pyrethrum and tobacco only were found, consequently 

 upon hearing from Mr. Hammond a fresh sample was at once obtained 

 from him, in which were found all the ingredients he mentions above, 

 excepting oil of cedar, which was present in such small quantities 

 that we were unable to find a good test for it, mixed as it was with 

 the other constituents. In the sample originally examined the cam- 

 phor and napthalene had entirely volatilized. Mr. Hammond was 

 informed that whoever was supplying him with pyrethrum was color- 

 ing it with lead chromate. 



