CHEMICAL LABORATORY AT THE UNIVERSITY OF SYDNEY. 171 



permit of it, in a turret or upper room, not only for a supply of 

 water under pressure, biit as a precaution against tire, lire hoses 

 connected with this will be placed in the corridors and in all the 

 principal rooms. All the gas and water pipes, .speaking tubes, 

 battery, telephone and electric light wires are arranged in channels 

 along the floors, and down the angles of the rooms in such a way 

 as to be readily accessible at all times ; the covering boards, 

 where such are necessary, being arranged to open on hinges ; but 

 wherever possible all pipes and wires will be left exposed as in the 

 temporary chemical laboratory. It is proposed to take them 

 from the ground floor to the basement down by the dust shoot, 

 which will form a well pas,sing from the turret to the basement. 

 This well can also be utilized for the aspirator and compressed air 

 tubes. It is proposed to use speaking tubes for communication 

 between the dift'erent parts of the chemical laboratory, and the 

 telephone for the same purpose to other parts of the University. 



The gas and water pipes are to be so arranged and provided 

 with shut ofl" taps that repairs and alterations can be made in 

 one part of the building without stopping the supply in all the 

 other rooms. These taps will not be placed in the floor, as is 

 often the case, but at a convenient height on the wall. 



LIGHTING. 



In some places it will be necessary to have roof lights, but in 

 such cases the skylights are designed to receive their light as 

 much as possible from the south, so as to exclude the direct rays 

 of the sun and to keep the place as cool as possible in the 

 summer ; the skylights will also be utilized as ventilators. In 

 the lecture room arrangements ai"e made for readily darkening 

 them, and in such a way as to be under the easy control of the 

 lecturer. 



Some of the windows are utilised as draught cupboaixls by 

 enclosing the outer side of the lower sash, and the space under- 

 neath is intended for gas stoves, furnaces, etc. The flues connected 

 with the window draught cupboards are carried down to below 

 the floor level so that horizontal flues from the tables can be 

 connected with them. 



The windows are designed as free from obstructions as possible, 

 so that they can be used with microscopes and other optical 

 instruments. The lower part of the windows open with ordinary 

 sashes, and the upper part on hinges to enable the rooms to be 

 quickly cleared of noxious fumes. The window sills are of flat 

 slate or stone slabs, so that a heliostat or other instrument can 

 be placed outside the window. 



In the Mineralogy rooms the doors and windows are, as far as 

 possible, placed opposite to one another to allow a beam of light 

 to be reflected thi'ough from room to room according to the 

 position of the sun. The window sills are ari*anged to come 



