LABORATORIES, SYDNEY SCHOOL OF MINES. 831 
THe CHEMICAL LABORATORIES. 
The chemical laboratories, built in 1889 (Report Aust. 
Assoc. A. Sci., 1888), are contained in a plain rectangular 
structure, about 170 feet long by 86 feet wide (Plate 1). 
There are two lecture rooms, two principal laboratories, and 
several other rooms for special purposes. 
The large lecture room will seat 180, and the smaller one 
about 120 students. The junior laboratory (Plate 4) con- 
tains 40 benches, and the senior laboratory (Plate 3) has 
accommodation for 48 advanced students (Plate). There 
are also separate rooms for spectroscopic and gas analysis 
and photography. Two rooms have been specially provided 
and fitted up for research work; another room is set apart 
as a museum for chemical collections, and. old forms of 
apparatus, &c., which are of historical interest. 
The building is provided with the electric hght through- 
out the upper floor, and the gasengine for driving the 
dynamos is also attached to the shafting connected with 
the crushing, grinding, and concentrating machines, the ap- 
paratus for the liquefaction of gases, and other appliances. 
Leads are carried to convenient places in the laboratories, 
so that if necessary the full power of the dynamos may be 
used for experimental purposes. 
Special efforts have been made to give the students the 
benefits of modern improvements and appliances, and par- 
ticularly those which tend to save time. Draught cup- 
boards, filter-pumps, exhaust-pumps, and similar conveni- 
ences are fitted to each bench. A number of large hoods 
and draught cupboards for combustions, sulphuretted 
hydrogen gas, water baths, and ovens are also provided. 
There are three balance rooms, each 21 feet x 16 feet, pro- 
vided with balances for different purposes, which, to prevent 
vibration, rest on slate benches, supported upon stone 
brackets. 
METALLURGICAL LABORATORY. 
Milling and Leaching Buildings. 
The plant for the crushing, concentration, and other 
treatment of metalliferous ores is contained in the new 
building, and it includes a set of three small stamps by 
Krupp, presented by Messrs. Noyes Bros., Sydney; Gate’s 
rock-breaker, Roger’s crushing-rolls, trommels, samplers, 
amalgamating plates, a Frue vanner, plunger jigs, settling 
tanks, drilling and planing machines, &c.; also vats and the 
necessary appliances for the extraction of gold and silver 
ores by chlorine, cyanide, hyposulphite, and other similar 
leaching processes (see Plates), These have been con- 
structed of such a size as to permit of their being worked by 
