668 TRANSACTIONS OP SECTION G. 



for the first time. These facts are illustrated by photomicrographs in the com- 

 ])lete paper. A tentative explanation based on general physical principles is put 

 forward. 



6, On a Magnetic Indicator of Temperature for Hardening Steel} 

 By William Taylor. 



The author described experiments with a magnetic induction balance used for 

 ascertaining the critical temperature in the heating of steel for hardening. Also 

 a simple magnetic attachment to a muffle furnace used for giving an audible 

 signal when the steel heated in the muffle has reached its critical temperature. 



MONDAY, AUGUST G. 



The following Papers were read : — • 



1. The JVew Engineering Laboratories, Edinburgh University, and their 

 Equipment. By Professor T. Hudson Beare, M.Inst.C.E., 

 M.Inst. M.E. 



The author described the block of buildings completed in the early part of the 

 present year for the Engineering School of Edinburgh University, and gave details 

 of their equipment. 



The building is T-sbaped, the head of the T facing west. In the head of 

 the T, on the ground floor, are provided large laboratories for the testing of 

 materials and for hydraulics. The first floor is devoted mainly to a laboratory 

 for experimental work which does not require heavy machinery. On this floor 

 there are also a small lecture-room, the departmental library, and the private 

 rooms for the staff". 



The back block of the building is also divided into two floors : the lower forms 

 the lecture theatre and the upper the drawing office. The lecture theatre will 

 seat about 120 students, and on the lecturer's table are all the needful appliances 

 for experimental demonstrations, there being steam, gas, and electrical con- 

 nections. There are also the necessary appliances for darkening the room in order 

 to allow of the free use of lantern demonstrations. The drawing office is a fine 

 room, about 45 feet square, lit entirely from the north and east, the roof being of 

 the saw-tooth pattern, the floor-space giving room for about sixty independent 

 drawing-tables. Special rooms have also been set aside for blue print-work and 

 photography. 



A workshop and heat laboratory has been provided for by roofing in and con- 

 necting to the main building a piece of ground lying to the north-east of the main 

 building. The workshop and laboratory contains examples of all the ordinary 

 machine-tools, gas-engines, steam-engines, and other plant for experimental research 

 in connection with thermodynamics. 



The building is heated by hot water and by steam : an independent boiler- 

 house has been constructed for this purpose, with two large boilers. 



A considerable amount of additional apparatus has been installed in these 

 new buildings. The testing laboratory now contains a 100-ton Buckton machine, 

 with the necessary electric motor, pump, and accumulator ; a 60,000-lb. Riehle 

 machine ; an Amsler 100-ton machine, specially designed for compression and 

 bending work ; and a complete installation for the testing of cements, mortars, &c. 



In connection with the hydraulic laboratory a water tower has been con- 

 structed at the south-east corner of the building ; at the top of this tower is a 

 large cast-iron tank, holding about 10,000 gallons, and giving a head of 65 feet 

 above the floor-level of the laboratory. The floor of the laboratory is on two 

 different levels: on the upper level are placed the various turbines, water-wheels, 



' Published in the Electrician, August 24, 1906. 



