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SCIENCE. 



[Vol. X. No. 243 



poses of research, and furnishing the data used on the upper floor 

 in the designing of machines and structures. A room is set apart 

 on the upper floor for the use of the professor having direction of 

 the work, and taking charge of the building and apparatus. A 

 toilet and coat room is provided here, also, for the use of such 

 students as work on this floor. All these rooms are without other 

 finish than kalsomining on the walls ; but this is of a light-buff 

 shade, and the ceilings are finished in oiled yellow pine, with the 

 heavy beams supporting it painted a blue-white. Thus the rooms 

 are all well lighted, and are exceedingly bright and cheery. All the 

 heating-pipes are placed overhead ; and it is expected that the ex- 

 perience already had with this arrangement will be here repeated, 

 and a thoroughly equable and pleasant temperature obtained. The 

 steam-pipes are also out of the way, and desks, tables, benches, or 

 other furniture can be placed at the windows, and no annoyance 

 felt from the uncomfortable proximity of the source of heat. Lock- 

 ers are provided for the drawing-boards, while the tables are con- 



the use of students working up their data, and another room for 

 special research, which will contain the balances, the few pieces of 

 chemical apparatus needed for gas-analysis, and- other work which 

 can best be done here rather than in the general and larger labora- 

 tories. The centre of the large room is reserved for a very heavy 

 testing-machine, which it is proposed to place there at some future 

 time. 



At the left of the hall, and in the west end of the building, is a 

 group of rooms having special interest to the engineer engaged in 

 work related in any way to steam-engineering. The largest room 

 of the three is devoted to tests of engines, steam-pumps, and vari- 

 ous motors (steam, air, gas, and water driven), which will be set up 

 permanently, and to the temporary mounting of small motors sent 

 in for test. A steam-pipe from the boilers in the adjacent apart- 

 ment, and connecting also with the larger boilers in the main part 

 of the college group of buildings, supplies steam to the steam- 

 engines and steam-pumps. Amongst the machinery here mounted 



4 



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I'vU^ 



SiBLEV College Extension, Cornell University. 



structed with drawers to take in the small apparatus ; and cases on 

 the walls will be arranged for T-squares and other instruments 

 either too large to be otherwise cared for, or, being the property of 

 the college, such as must be accessible to the instructors at all 

 times. 



The lower floor is constructed and is finished very much like the 

 upper ; but it is appropriated to a most interesting and novel part 

 of the work of the college. In the middle of the building is a trans- 

 verse hall out of which opens the toilet and coat room. At the 

 right, on the east side of the hall, is a large room, of similar size to 

 the great drawing-room overhead, in which are placed all the 

 testing-machines for use in investigating the strength and other 

 properties of the materials used in mechanical engineering and con- 

 struction, including several tension-machines made by Rhiele, Fair- 

 banks, Olsen, and Brown & Sharpe, a transverse testing-machine 

 built by Fairbanks, an ' autographic recording testing-machine ' of 

 the Thurston pattern, designed by Bond, and built by the Pratt & 

 Whitney Company, two sizes of Thurston's lubricant testing-ma- 

 chines, dynamometers of various types and sizes, and miscellaneous 

 apparatus of similar character. Farther toward the right, and at 

 the east end of the building, are a room for an instructor and for 



are a straight-line engine built in the college workshops, a West- 

 inghouse engine, a Brayton petroleum-engine, an Ericsson engine 

 (given to the director by his friend, its distinguished inventor), vari- 

 ous makes of steam-pump of the best types in the market, and 

 other apparatus and machinery that properly fall into this class. 



At the extreme west end of this floor are the boiler-room, in 

 which are the heating-boilers, which are placed there as a reserve 

 and for experimental purposes, and all boiler accessories. A space is 

 reserved at one side for the large experimental boiler, which is pro- 

 posed to be used in making boiler trials on a larger scale, and for 

 investigations at pressures exceeding those commonly employed, and 

 ranging up to possibly five hundred pounds per square inch. The 

 second of these two rooms is appropriated to calorimetric investiga- 

 tions, including the calorimetric tests of the quality of steam, which 

 are to-day — more than fifteen years after their introduction in this 

 country by Emery and Thurston, and abroad by Him — just com- 

 ing to be recognized as essential to any satisfactory determination 

 of the efficiency of boilers. The various forms of calorimeter now in 

 use will be set up here, and made useful both in regular instruc- 

 tion, as is all the apparatus of the laboratory, and in special re- 

 searches involving their use. Just outside this end of the building 



