634 



SCIENCE 



[N. S. Vol. XXV. No. 642 



dation in the country. The furnaces consist 

 of eighteen large muffles for scorification and 

 cupellation and fourteen pot furnaces for 

 crucible work. Each furnace has a separate 

 flue. The students' desks are topped with an 

 inch and a half slab of Alberene stone and 

 each contains drawers for the accommodation 

 of apparatus. The supporting legs are of iron. 

 Water is supplied at the ends of the rows of 

 desks, where are situated sinks of Alberene 

 stone. The other furniture of the laboratory- 

 consists of anvil blocks, tables for bucking 

 plates, ore-crushers and racks for cooling 

 crucibles. 



Quantitative Laboratory (44x16 ft.). This 

 laboratory has accommodations for twenty stu- 

 dents at a time in quantitative analysis. It is 

 excellently lighted. The students' desks are 

 topped with Alberene stone supported upon 

 iron supports and containing four drawers for 

 apparatus, with storage room below each desk 

 for larger pieces. The large hood accommo- 

 dation is provided with hot plates and water 

 bath, the hoods being made of angle iron 

 painted with aluminum paint and are glazed 

 with corrugated glass. Water is supplied in 

 sinks of solid porcelain. Gas, air blast and 

 suction are also at hand. A special weighing 

 room (7 X 16 ft.) opens off this laboratory, 

 where the balances are supported on Alberene 

 stone bracketed to a brick wall of especially 

 heavy construction. Next to this balance 

 room is a second balance room similarly fitted 

 up and containing the assay balances for the 

 students in the assay laboratory. 



Instructors' Eoom (19x13). This room 

 opens both into the assay laboratory and into 

 the quantitative laboratory and is fitted with 

 hood, water, blast, suction and the other requi- 

 sites for a complete private laboratory for the 

 instructor in that department. It is also ar- 

 ranged to accommodate the supplies of ma- 

 terials issued to students as examination topics 

 in both the courses over which it has control. 



The Stock Rooms are four in number 

 (9x16, 12x26, 9x16, 5x16) and are fitted 

 with appropriate shelving to accommodate the 

 chemicals and apparatus required for general 

 laboratory purposes. 



The Sulphuretted Hydrogen Room (8x6) 

 is ventilated by special device directly into 

 the open air and contains the sulphuretted- 

 hydrogen apparatus from which the gas is 

 piped to the thirty-six outlets in the main 

 qualitative laboratory on the floor above. The 

 gas is delivered under a pressure of about ten 

 inches of water. 



Fuel Bins (11 x 8), for the coal and coke 

 necessary for the assay laboratory, are ar- 

 ranged so as to permit the fuel to be shot 

 through coal-holes in the roof, which is on the 

 level of the roadway above. 



Second Floor. — Main Qualitative Labora- 

 tory (50x80 ft.). This room is lighted by 

 large windows on four sides and by a skylight 

 extending over half its area. On each end 

 are the hoods made of metal and glass, eight 

 in number, and each 6 feet in length, making 

 a total hood accommodation of nearly 100 

 linear feet. These hoods contain the hot plates 

 and the steam baths for boiling and evapora- 

 tion and they also contain the thirty-six out- 

 lets wherefrom students can secure sulphur- 

 etted-hydrogen gas for purposes of precipita- 

 tion. The steam baths are two in number, 

 with accommodations for fifty steam evapora- 

 tions at once, the steam being admitted to 

 chambers of Alberene stone directly from the 

 steam pipes of the heating system. Each hood 

 has its own individual outlet flue for fumes. 

 The laboratory has accommodations for one 

 hundred and thirty students at a time in 

 qualitative analysis. Students' desks are 

 topped with Alberene stone and are furnished 

 with four drawers and two closets for appa- 

 ratus. Water is supplied to each desk and 

 the sinks are of solid porcelain. Each stu- 

 dent is provided with forty reagents in glass 

 bottles which are supported by shelves of plate 

 glass resting upon metallic uprights. The 

 heating of this laboratory, as of all other 

 rooms in the building, is furnished from the 

 steam plant in the department of electrical 

 engineering. Radiators are everywhere placed 

 under the windows, and in addition to the heat 

 so supplied a further quantity is furnished by 

 the ventilation system. Air is sucked in- 

 from the outside, passed over heated steam 



