832 APPENDIX 'TO SECTION B. 
students. The milling and leaching room is about 35 by 100 
feet; there are also verandahs and open yard space for 
outdoor operations. 
The experimental roasting furnace, with a bed 6 feet x 4 
feet, is placed out of doors, but under a tiled roof for cool- 
ness and protection from the weather (see Plate 2, fig. 2, 9, 
10, 11, and 12), and the fuel bins are arranged alongside of 
it (Plate 2, fig. 13). 
Assay Laboratory. 
The new assay laboratory (Plates 1 and 2 and 8) is a lofty 
room, with 40 feet x 54 feet floor space; the walls are 22 
feet high, and the roof 30 feet high. It is well ventilated. 
It contains 20 fusion and 12 muffle furnaces, arranged down 
the middle of the room. The flues are carried beneath the 
floor to a central stack (Plate 2, figs. 2 and 3). For clean- 
liness and strength the furnaces are completely enclosed in 
iron plates, and the muffles are closed by sliding double iron 
doors, in addition to the usual fireclay door. Iron racks 
are arranged over the fusion furnaces for drying crucibles, 
and for the reception of the tongs, pokers, &c., when not in 
use. (Plates 8 and 10 and Plate 2, figs. 3, 6, 7, 8, and 9, for 
sections and details.) In addition, there are 12 fusion and 
four muffle furnaces in the main building. 
The working benches (Plates 8 and 9) are fitted with 
drawers, shelves, and draught cupboards with hot plates, and 
fixed bunsen burners. They are also provided with gas and 
water and exhaust pumps, in much the same way as those in 
the chemical laboratory. By using a staple and brass disk, 
which covers the angles of the three drawers, one padlock 
is made to securely close all three drawers. One disk also 
closes the two cupboards allotted to each student; the mul- 
tiplicity of locks and the usual loss of keys are thereby 
avoided. 
A feature in the assay laboratory, as well as in the chemi- 
cal laboratory, is that all the water baths and water ovens 
are kept full by means of constant supply cisterns fitted 
with balltaps, so that there is no danger of their running 
dry ; neither is there the usual unnecessary waste of water, 
which is the fault of most systems. There is no limit to the 
number of water baths and ovens, which can be supplied by 
one cistern and ball-tap. 
It is supplied with gas furnaces and gas muffles ; also with 
leads and meters for electrolytical processes. 
The Mining School at the University of Sydney has been 
opened to the public since 1892, and at present there are 
about 80 students working for the degree in Mining Engi- 
neering, or for certificates in some branch of that profession. 
