TAB. XLV. 

 CUPRUM arseniatum, var. amianthiformis. 



Amianthiform Arseniate of Copper. 



Class 3. Metals. Order I. Homogeneous. 

 Gen. 4. Copper. Spec. Arseniate of Copper. 



Div. 2. Imitative. Var. 2. Amianthiform. 



Spec. Char. Copper combined with arsenic acid. 



Syn. Amianthiform arseniate of copper. Bournon? 

 Phil. Trans. 1801. £. 180. 

 N. 2. 4th species, &c. Chenevix, Phil. Trans. 

 1801, p. 199. 



1 his species of copper appears first to have been described 

 by Count Bournon. The present variety is a curious ex- 

 ample, and seems so well described by the above author, 

 that we shall transcribe part of his own words. "This 

 variety is composed of fibres as delicate as those of ami- 

 anthus, of the flexibility of which they frequently possess 

 a certain degree." In the present specimen they resemble 

 the finest filaments of silk. It serves to show a variety in 

 colour not mentioned by Count Bournon, viz. the purple 

 hue, which more or less covers the surfaces or the points of 

 the flexible threads. The other parts are of a lightish straw 

 ■vellovv. Its resemblance to a raceme of currants or a bunch 



