290 PROCEEDINGS OF SECTION B. 
First Matte from Charges. 
No. | 9 | 10 | 11 | 12 13 | 14 | 15 | 16 
Lend Bee 36°8 | 25°5 42:0 | 29:2 | 58:4 | 35:4 | 23-7 
Copper % vse 42| 4:4 42| 62| 32| 40] 4:4 
Silver, 0Z. voce 42-0 | 29-0 41:0 | 52°0 | 35:8 | 33:0] 31°0 
Sample Assays of other Mattes. 
WC RLy senior ssenctiaeeeas 39°7 33°7 31°3 32°8 34°4 43°2 
Coppers wa-eaanemcones 29°6 25:3 27:3 29-2 28°4 22°0 
Silivieny Ozone trae 195:00 | 244:00 | 138:00 | 163-00 | 172-00 | 182-00 
Third Matte Assays. 
RAL stir wert ave ar a'efon:crveltearnewrtenesee 29°8 32°9 37°9 371 
COpperigieiscatieasserevosssbesecions 40°0 42:2 Bs 32°7 
Silver MBE. coshachatacucemeecrkoas 32600 361°00 179°00 261:00 
The ironstone shown in these tables is distinct from the iron 
ore, the latter being the produce of the mine, analyses of which 
are given under the head of manganic iron ore, whilst the former 
was purchased at a cost of about 21s. a ton. It assayed from 
6 to 14 per cent. silica and 50 to 60 per cent. of Fe. 
The limestone came from Tarrawingee, and assayed from 6 to 11 
per cent. silica, 1 to 5 per cent. of carbonate of magnesia, 14 per 
cent. ferric oxide iron, the balance being carbonate of lime. It 
cost 14s. a ton landed on the mine. 
Regarded as a smelting ore, the Proprietary ore was decidedly 
a nice one. Its composition, wherever the ore came from, was 
such a happy blending of bases and silica that it smelted very 
easily indeed, and had some means been provided by which the 
ore could have been regulated in its fluxing value as it went to 
the furnaces, as well as its silver and lead value, the mischief 
caused by irregular qualities of ore would, of course, have ceased, 
and allowed of clean smelting there as elsewhere. 
The presence of manganese binoxide in the ore was also of the 
greatest assistance both as an oxidiser for the sulphur and for its 
rapid melting qualities. The zinc was never present in the slags 
in sufficient quantity to cause any mischief. Alumina was the 
greatest nuisance ; and my experience has been that with slags up 
to about 36 per cent. in silica the alumina acted as a base ; but 
usually as soon as this point was overstepped, the slags immedi- 
ately thickened up and assumed a most silicious appearance, due, 
