42 



INSECTICIDE STUDIES. 



\VIIITK ARSENOIDS. 

 T.M5I.K V. t'nlii/iitxititiii nf U'liitf 



Constituents. 



Sample Sumple 

 No. 27. No. 91. 



l'i r ri nf. I'l / fi nt. 



Barium oxid 42. 39 \\.\\\ 



Hariuin to join with chlorin 8.60 c>. Iti 



1. 1 -id oxid 1. 55 .96 



Carbon dioxid in. 1 5 



( 'hlorin 1. 15 3. 19 



Silica .20 



A rsenii >ns ox id 27. f, 1 31. 90 



M risture 4. 00 2. 35 



Sol i:l.].- arsenious oxid 27.64 



PARIS (iREKN AND HoRDKAt \ MIV1TRK. 



The composition of this sample. No. _?7<. was us follows: 



IV r cent. 



Total arsenious oxid 15. 49 



Copper oxid 16. 02 



Soluble arsenious oxid 1. 7'2 



SLU<; SHOTS. 

 TABLE VI. Composition of Slny Mint*. 



f . , Sample Sample Sample 



Constituents. No. 181. No. L-W. No. W7. 



Percent. I'IT cent. l'i r r< nt. 



Arsenious oxid I). 60 1 . 5S 



Copper oxid 1.44 .60 



Lime ' 30.25 28.82 



Sulphur triozid 43.02 . 41.18 



Ferric oxid and alumina . "'. 



Si id i urn chlorid 2. 83 



Insoluble 1. 38 



Volatile organic matter (by difference) ' 4.79 



The sodium chlorid in sample No. 2!io was calculated from a content 

 of 1.72 per cent of chlorin. The volatile organic matter in this sample 

 consist -d principally of dead oil. 



In sample No. 307 small amounts of sulphur, copper sulphate, oxid 

 of iron, carbolic acid, and tobacco, with less than 1 per cent of arsenic, 

 were also present. 



Slu^- Shot is evidently a mixture of fairly constant composition con- 

 taining in all cases small amounts of arsenious oxid and copper oxid 

 as active poisonous constituents. 



PKi:o\ ID OK si 1. 1C \TI->. 



T MM K VI I. 



/ i>< rOXid "f siHnifi.t. 



Moi>tun- 



Ar-niious oxid 



Copper oxid 



Sulphur trioxid 



Calcium oxid 



Insoluble 



Ferric oxid and alumina 



organic and volatile matter iby ditTi-rem-e > 



Sample 



Sample 

 No. 289. 



/'<; cuit. 



.:.7 



49.66 

 41.18 



2. :u 



I'tr c, nt. 



1. 11 



1.47 



.28 



52.29 



W. \:\ 



1.93 



1.40 



4.76 



