180 PROCEEDINGS OF SECTION B. 



gutter be employed, one overflow receptacle to catch paper, 

 matches, etc., will suffice. The dram pipes are disconnected from 

 all soil pipes. 



A master key is retained for all the benches. One lock does 

 for each, since the drawers are fastened underneath by buttons 

 and the sliding door is caught by the lock, so that the student 

 has to use only one key. The retort rings, filtering rings, book 

 rests, and writing slope, are attached to the draught cupboard by 

 slots in metal plates attached to the uprights, the former inside 

 as well as outside, these go nearly through the two-and-a-half 

 inches of wood, so as to give firm and untwisting support. The 

 draught cupboards are floored with white tiles. 



DRAUGHT CUPBOARDS. 



To save space in the width of the room, the large draught 

 cupboards are built out from the windows. These are about four 

 feet in height, and twenty-one inches deep from front to back. 

 The window is divided into three, the lower sash rises as usual, 

 the middle is fixed, and the upper part opens for ventilation. As 

 each window is about four feet eight inches wide, good I'oomy 

 draught places are obtained. 



The draught is obtained by a gas jet in the flue by the side, 

 each vertical flue ventilates two cupboards. The side walls are 

 lined with white tiles, and the slate slab or floor forms a roof for 

 a lower niche, serving for heating gas stoves, furnaces, etc., 

 which discharge into a separate flue. This flue, in common with 

 the others, when not in use can be closed by an ii'on door or 

 damper. 



It is proposed to hang the sash fiom copper-plated .steel tapes 

 Avorking through stuffing boxes containing glass, wool, and paraffin, 

 or vaseline, to prevent oxidation. Cords are an endless source of 

 trouble, since the hemp or flax is rapidly acted upon by the acid 

 fumes. All the gas taps are outside, and to each chamber there 

 are two half -inch and two three-quarter-inch taps, with quadrant 

 handles. Sulphuretted hydrogen is laid on to each, as in the 

 case of the bench draught cupboard, and the draught is obtained 

 by a Bunsen burner, with perforated fire-clay cylinder over it. 

 These draught cupboards are large enough to serve as combustion 

 niches, so that special ones for this purpose are unnecessary. 



The flues from the draught cupboards are built out as pilasters, 

 and form an ornamental architectural feature in the building both 

 inside and outside. The flues from the draught cupboards are 

 six inches by nine inches and fourteen inches by nine inches. 



Those from the tables and lecture tables are six inches diameter 

 in the clear, or about six and a-half inches outside, since the 

 sheet-iron pipes are lined with asbestos cardboard saturated with 

 sodium silicate, pitch or otherwise treated, to prevent corrosion 

 of the iron. 



