176 PROCEEDINGS OF SECTION B. 



GAS ANALYSIS, SPECTROSCOPE, AND POLARISCOPE ROOM. 



This room will have to be used for several different purposes, 

 but to fit it for gas work, the floor is to be of asphalt with grooves 

 sloping to one corner, so as to collect any mei'cury that may be 

 spilt. 



The tables in this room will all be grooved round the edges for 

 the same purpose. 



This room will also be used for photographic, photometric, 

 and similar work, and will be fitted with blinds and shutters 

 (with suitable openings) for darkening. Also with gas and water, 

 a di"aught clipboard, and with a low work bench, so that the 

 observer can be seated at his work. 



METALLURGICAL LABORATORY. 



In this room there is a group of two nine-incli and two twelve- 

 inch wind furnaces, and of two muffle furnaces, (Plate X.) 

 built according to the plans given in Percy's " Metallurgy " of 

 Silver, except that they are cased completely with iron, and a 

 hood is placed over to carry off the hot air and fumes which may 

 arise. The iron casing allows the fire brick lining to be thinner, 

 consequently the space occupied by the furnaces is reduced. 



At the end of the room a slate bench, with hood over, is 

 arranged for use with gas furnaces. It is proposed to have the 

 gas engine, and crushing and grinding apparatus in this or in 

 an adjoining room not shown in the plan. The other fittings are 

 the ordinary character and require no special comment. 



Opposite is the metallurgical laboratory and balance room ; on 

 this floor there is also a small metallurgical lecture-room, and a 

 store for coarser chemical and metallurgical apparatus, acids, and 

 re-agents. The coke, coal, wood, &c., for this department are 

 kept in iron wheeled trucks so that they can be run out for filling. 

 Ashes will also be removed in a similar iron truck. 



STORE ROOMS. 



These rooms are fitted with the necessary shelves and drawers 

 for apparatus. There is also a sink and lead covered table for 

 mixing acids, etc., in each. In the centre of each is a group of 

 skeleton shelves for light and bulky apparatus. 



MINERALOGY. 



For this subject there is a small lecture room and a 

 mineralogical laboi'atory off the mineralogy museum, The museum 

 is intended to be simply a teaching collection, and not a general 

 one, as it is thought unnecessary to have another, there being 

 already one in the Australian Museum in College-street, and 

 special mineral collections at the Teclmological Museum and in 

 the Mining and Geological Museum at the Department of Mines. 



