142 



SCIENCE. 



[Vol. XVI. No. 397 



which the working library is kept and all its technical periodicals 

 — a hundred of them — filed. In the court is the boiler-house 

 with its 600 horse-power of water-tube boilers, selected for safety 

 and compactness; at the left, the dynamo-room with its driving 

 engines; beyond, the machine-shop, 165 feet by 40, and its ofiSce, 

 toilet-rooms, and lockers (of the latter some 500, including those 

 at the foundry and forge across the road). The latter building 

 is 150 feet by 40, and, though a frame building, one of the 

 neatest buildings on the campus. Between this building and the 

 main building of Sibley College, and east of the latter, is the large 

 building, 150 by 40, devoted to the work of the Department of Ex- 

 perimental Engineering, — the mechanical laboratory,— in which 



Siblej CollegeBuil dings. 



J Ground-floor 





I T«tll- and., '^1 Ma^CTUlA 



are placed all the testing-machines for metal and materials of all 

 sorts, from 10,000 to 100,000 pounds capacity ; a number of lubri- 

 cant testing-machines; and also a considerable amount of miscel- 

 laneous apparatus of research in engineering. The boiler-test 

 department is fitted up in the main boiler-house; and the several 

 engines are placed adjacent, both the half-dozen devoted to ex- 

 perimental use and those employed for driving the dynamos used 

 for electric lighting. The plans of the second floor. Fig. 2, exhibit 

 the extent of the wood- working shops, 165 by 40 ; the|upper part 

 of the laboratory building, in which the problems of design and 

 of the laboratory are worked out; and the arrangement of the 

 main building ; in the latter the offices and lecture-room'of the 



E 



Dnwing-lDniwinflc lurawinjr i | e 





floor, which is, however, only a provisional arrangement of the 

 professors of physics and of electrical engineering, and subject to 

 amendment as the exigencies of the case may require. The 

 crowd of small dynamos for individual instruction, of which 

 there are a half-dozen each, for example, of the Edison and the 

 Westinghouse, and a number of others of the better known types, 

 will be used in the physical building. Other dynamos and other 

 engines are continually coming in, and it is thought to be but a 

 matter of very short time before it will be found imperatively 

 necessary to put up a great engineering laboratory, in which to 

 group every thing demanding power and steady speed, as well as 

 all the apparatus of the Sibley College proper. It is presumed 

 that, when built, it will bear the name of the "coming unknown," 

 who will thus at once do a great work and build himself a perma- 

 nent monument. 



Space will not permit the description of the improved and 

 numerous courses of instruction open to technical students at 

 Cornell to-day. They include purely professional courses in 

 agriculture and in engineering, courses in chemistry and physics, 

 in all the natural sciences, and in mathematics, pure and applied, 

 and undergraduate and advanced, in every line in which the 

 ambitious student may desire to excel. For those entering the 

 professions, the courses in patent law and in political and social 

 economy, in ethics and in history, are well adapted, and are found 

 fittingly to supplement the work in the engineering and oth»r 

 technical courses. Many students are taking advanced work in 

 technical departments, and at the same time such outside work as 

 their plans may seem best to warrant. All students in regular 

 mechanical engineering are given instruction in electricity; and, 

 for those who desire it, work is specialized, in the senior and post- 

 graduate years, for students in electrical engineering, as in 

 steam, marine, and other lines of engineering, and in professional 

 work having relation thereto. Of all this, the interested student 

 may learn by applying to the President of the University ; to the 

 Director of Sibley College, and to the heads of the other great 

 departments, in either of which he may desire to work. 



director, and the lecture-room of the professor of electrical engi- 

 neering. The professor of mechanic arts, the professor of machine 

 construction, and th« professor of experimental engineering share 

 the other lecture-rooms shown in this and the other plans ; while 

 the officer detailed from the United States Naval Engineer Corps 

 to give instruction especially in steam and naval engineering finds 

 accommodations in the laboratory building. 



These plans are not, however, precisely accurate in their appor- 

 tionment of apparatus. The Department of Electrical Engineer- 

 ing and that of physics have become so large, and their stock of 

 apparatus so extensive, that it is probable that the coming college 

 year may see all their larger machinery transferred to the dynamo- 

 room, and even overflow into the west end of the machine-shop 



THE TIME-EELATIONS OF MENTAL PHENOMENA. 



[Continued from p. 117.] 



Having thus considered the time-relations of a simple re- 

 action, we may proceed, on the line of analysis there laid 

 down, to the consideration of the more complex forms of 

 re-action. 



Adaptive Re-actions. 



It has been noted that the promineat characteristic 

 of a useful re-action is the adaptation of the response 

 to the excitation by which it was called out. This 

 adaptation involves a recognition of the stimulus, and 

 its association with the movement in question. In this 

 recognition we found it convenient to distinguish between 

 the recognition of the presence and that of the nature of the 

 stimulus ; hut it may be questioned whether we can recognize 

 the presence except by noting some point of the nature of 

 the stimulus, and whether the noting of this point does not 

 involve its distinction from othei-s. If, in re-acting to a 

 sound, I recognize that it is the stimulus to which I am to 

 re-act, and press the key, does this mean that I know that 

 the stimulus is not a visual or a tactile one, that it is not a 

 higher or a lower, a louder or a feebler, sound ? Here, as 

 still more in the analysis to follow, our experimental basis 

 is defective. Experiment has naturally followed the lines 

 of convenience and ready analysis; and as there has been 

 little harmony in these analyses, and as the one here adopted 

 differs somewhat from those adopted by other writers, it will 

 be difficult to maintain the parallelism between theoretical 



