the Analyses of M. Klaprofh. 81 



i^ooling, nearly in the same maiuier as sulphur of which iu 



crystals assume also the colour. 



The phospliate of lead of Zschopan reduced by black 



flux, and treated by the nitric and sulphuric acids to obtain 



phosphoric acid, is composed of 



Oxide of lead - - - 78-40 

 Phosphoric acid - - 18'37 



Muriatic acid - - - 1*70 



Oxide of iron - - - O'lO 



98-57 



That of Hoffsguind, near Frlbourg, in the Erisgaw, con- 

 tams 



Oxide of lead - - - 77*10 

 Phosphoric acid - - 19 



Muriatic acid _ _ - 1-54 



Oxide of iron - - - OlO 



97-74 



The brown ore of phosphate of lead of Huelgoet in Brit- 

 tany contains 



Oxide of lead - - - 78-58 

 Phosphoric acid - - 19-73 



Muriatic acid - - - I •65 



99-96 



The crystals subjected to this analysis were composed of 

 hexaedral prisms agglutinated together, of the size of a 

 goose's quill, and half-an-inch in length. Their specific 

 gravity, according to M. Klaproth, is 6-600. 



The leraon-coToured ore of phosphate of lead of Wan- 

 lochhead in Scotland fuses, on coals, into a whitish green 

 ©pake globule with some large brilliant facets, or facets the 

 surface of which is covered with radii tliat cross each other. 

 It contains 



Oxide of lead - - - 60 

 Phosphoric acid - ' - 18 



Muriatic acid - - - 1.64 



99*62 



The yellow colovir of this ore seems tQ ajisc merely from 

 F 4 a greater 



