40 
Table of Proportions of Fluxes* 
Let the earthy pait of an argillaceous ore be composed 
of clay 9, lime 6, sand 3 — 18. 
To assay 4 troy ounces of this ore - 
add 4 ■ ■ — bottle glass 
3 - — — chalk 
— < — — • charcoal 
Let the second variety of argillaceous ores 
lex 7, lime 3 = 20. 
In this case, 4 ounces troy of ore 
would require 4 — — «.i 
4 , 
‘ * - ■ ■■ ■» ■■■ » charcoal] 
or 192o grains, 
— 1920 
— . 1440 
— . 240 
bottle glass 
chalk 
OJ 
5520 
contain, clay 10, si- 
or 1920 grainy 
— 1920 
— 1920 
— 360 
12 | 
6120 
Let the first variety of the calcareous genus of iron-stone be sup- 
posed to contain, of earthy mixtures, lime 14, clay 6,silex 4 = 24 . 
When this iron-stone is to be assayed, 
to 
4 ounces troy 
or 1920 grains. 
add 
5 
bottle glass - ■ — 2400 
u — * — 
chalk - - — 720 
oj 
charcoal - - — 360 
114 
5400 
c 
Again, let the second variety of the calcareous genus be sup- 
posed to contain, lime 10, sand 6, clay 4 = 20. 
I would add to 4 troy ounces - or 1920 grainy 
4 i — < — - bottle glass — - 1920 
2 • — — — chalk — 960 
0-| - charcoal — 240 
10 * 
5040 
Let the first variety of siliceous ores be supposed to contai% 
silex 12, clay 8, lime 5 = 25. 
For an assay of 
4 troy ounces of ore * or 
1920 grains^ 
add 
4 — 
■ chalk 
1920 
— — • bottle glass 
1440 
0 
1 
— ■ — charcoal 
360 
5640 
