A SYSTEM OF 
114 . 
A, With parallel fibres, AJheftus fihris conjlans 
farallelis : Byjfus, 
1 . Pure and foft. 
a. Light green, from Schelkowa Gara in 
Siberia. . 
h. White, from Ulrica’s Ort in the mine 
of Salberg in Weflmanland : it is 
there found together with mountain 
leather. 
2. A little martial, and more brittle. 
a, Greenifh, from Baftnas Grufva, at 
Ryddarhyttan in Weflmanland. There 
it forms the greatefl: part of the vein 
out of which the copper ore is dug ; 
a great part of it is confequently 
melted together with the ore, and is 
then brought to a pure femi-tranfpa- 
.rent martial flag or glafs, 
SECT. CVI. 
B, Of broken and recombined fibres, Af~ 
bejlus fihris conftans abrupt is et conglutinatis. 
I. Martial. 
a. Light green, from Baftnas Grufva at 
Riddarhyttan. 
SECT. evil. 
It has been already obferved under the title of 
Cockle, or Shirl, (Sefl. Ixxiv.) that the afbeftus is 
often confounded with it. 
Observation on the Asbe s t us Kind. 
I am much inclined to believe that the Afbefti, 
as well as the Micse, are produced from an ar- 
gillaceous 
