ANALYSES OF I N-I.< TICI m.s AND I-T x<;in DKS. 43 



This mixture evident!} contain-* ar>eniou> oxid and copper a^ t he 

 active constituents, diluted with a large amount of gypsupi. In so far 

 as the arsenious oxid and copper content are concerned, this mixture 

 is of value as an insecticide: luit the gypsum is inert in its act ion upon 

 insects, except that when thespiraclo are not well protected they may 

 he closed up with this or any other line dust. 



[No. 222.] 



1'iT edit. 



Moist lire ..................................................... '.' 7S 



Sulphate nf lime (^vpsum) .................................... l'. ."4 



Magnesium oxid ......................... .................... : 



Ferric oxid ami alumina ...................................... 3. 02 



Arsenious oxid ................................................ 7'.' 



Copper oxid ....... . ........................................... 41 



silica ........................................................ 5. 42 



I.o-s on iirnition .............................................. L'S. <1 



KX<;LLSH Bl'CJ COMI-ofM). 



The coni})osition of this compound, No. 265, is as follows: 



Percent. 

 Arsenions oxid ............................................... 1. 4t> 



C'oj>}er oxid ................................................... till 



ORIENTAL FERTILIZER AND HI'*, PKsTKoYEK. 

 [X,,. 13(5.] 



( 'v/HjHifitioii of Oriented Fertilizer and l><"j ueftroyer, 



I'.T cent. 



Water ....................................................... 37. 1 4 



Total solids .................................................. 12. Sf> 



Arsenic oxid ............................................. 2. 38 



Potassium oxid ........................................... 3. 50 



Sodium oxid ............................................. 6. 08 



Nitrogen .................................................. <>7 



Chlorin .................................................. :5. < M i 



Sulphur trioxid ........................................... <>4 



This mixture is evident!}' sodium and potassium arsenates dissolved 

 in water. In so far as its content of arsenic is concerned, it would be 

 of value in killing insects. It might, however, if sprayed upon trees, 

 cause some damage by scorching, as the arsenic is in a soluble condi- 

 tion. Its fertilizing value is shown by its content of potash and 

 nitrogen. 



Another sample of Oriental Fertilizer and Bug Destroyer. No. 150, 

 gave, in 1,000 cc of liquid, 13.1:2 grams of arsenic and In.^.s grams of 

 potassium oxid. 



