OHUIESPONDENCE WITH MANUFACTURERS. 61 



[Serial No. 19524.] 



The arsenic percent age is above any we have used in many years. Our working 

 formula is now under 1 per cent. 



BENJ. HAMMOND. 

 [Serial No. 6 I & W.] 



I use a high-boiling paraffin oil, but have never used turpentine. I have sent 

 you by mail a sample of my insecticide and disinfectant. 



HEINE CHEMICAL Co. 



Commentby chemist : The sample sent by the Heine Chemical Com- 

 pany was received and analyzed and found to consist principally of one 

 of the higher-boiling petroleum oils and sassafras, but the same was 

 very different from the original sample analyzed, which evidently con- 

 sisted of kerosene and turpentine. A sample of the oil was sent to 

 Mr. Heine, stating the facts, and suggesting that perhaps someone was 

 putting up goods under his name, since every test showed that tur- 

 pentine was present. To this no reply was received. 



[Serial No. 2M.] 



Lee's insect powder contains one more ingredient not mentioned here. 



GEO. H. LEE Co. 



[Serial No. 19027.] 



Lee's Lice Killer is a coal-tar product heavily charged with trusts destructive to 

 insect life. It can not be prepared of uniform strength and quality from bulk mate- 

 rial obtained in open market, but requires fresh and uniform ingredients, special 

 manipulation, and air-tight packages. 



GEO. H. LEE Co. 



[Serial No. 19680.] 



We use the best and finest ground tobacco dust and lime chemically treated with 

 the higher products of coal tar. . If there is any sand in the mixture it goes in before 

 the goods reach our hands. 



D. J. LAMBERT. 



[Si-rinl No. 19533.] 



You are correct in your surmise that one sample does not always represent the 

 product of its manufacturer. AVe do not think that this can possibly be an exam- 

 ination of our standard article on account of the large percentages of acetic acid and 

 soluble arsenious oxid. 



JOHN LUCAS & Co. 



Comment by chemist: An examination of a sample forwarded by Mr. 

 Lucas was made with the following results: 



Per cent. 



Moisture. 0. 90 



Sand 11 



Sodium sulphate 1. 01 



At senious oxid 57. 21 



Copper oxid 31. 00 



Acetic acid . 9. 77 



100. 00 

 Soluble arsenious oxid . . 5. 33 



