134 



SCIENCE. 



[Vol. IV., No. 80. 



preparation of animals or organs for micro- 

 scopic work. It is merely a copper box, used 

 as a water-bath, big enough to hold a large 

 cat and several bottles of injection-material. 

 Pressure is obtained by letting water from the 

 tap run into a large bottle below the table. The 

 compressed air then forces the injection-mass 

 into the bod} 7 , every thing being kept at a suit- 

 able temperature by a lamp below. By using 

 T-tubes several vessels may be injected with 

 different substances at the same time. On a 

 small table by itself, but at the side of one of 

 the working-tables, is the k} T mographion (Kn). 

 This is of the Ludwig pattern, with a long roll 

 of paper. It has special wires from the tower 

 and from the pendulum. Over the kymograph- 

 ion is a large cover of painted cloth, stretched 

 on a light wooden frame. By aid of a pulley 

 in the ceiling, this cover is raised or lowered 

 as required. A similar cover hangs above the 

 table adjoining the pendulum, and an extra 

 one is on hand to be placed where needed. 

 The use of these dust-proof protectors makes 

 it possible to keep complicated or delicate 

 apparatus together for an experiment of in- 

 definite duration, and safe from all ordinary 

 disturbance when work is not going on. 



To the north the main laboratoiy opens di- 

 rectly into two small rooms of less height, 

 half-stories in fact, — the chemical room and 

 that of the assistant. Between the two is the 

 small private room of the professor. This 

 contains working-tables, with water and gas, 

 and can be conveniently used for private work. 

 The assistant's room has also a long work-table 

 especially arranged, as regards light and height, 

 for microscopical work ; and the room is, in 

 fact, partly occupied at present for the prepa- 

 ration of material for histological demonstra- 

 tions. This arrangement was made for the 

 economical use of the animal supplies of the 

 department. Another large table is intended 

 for the examination of curves and records. 

 There are also all the conveniences in the way 

 of gas, water, waste-pipes, and electrical wires, 

 needed to make the room convenient for private 

 work. The chemical room has a large work- 

 table, with numerous drawers to hold the more 

 delicate glass apparatus. There are also the 

 necessary shelves for chemicals and reagents. 

 At the side of the commodious hood is a steam- 

 bath, which has proved a great convenience. 

 The fittings of the room, and the apparatus, 

 are merely such as are required for ordinary 

 physiological work, the nearness of the chemical 

 laboratory on the same floor making a larger 

 room for this purpose unnecessary. 



The chemical room opens directly into the 



workshop of the laboratory, where the instru- 

 ments are cared for and repaired, and where 

 not a little even of the more delicate apparatus 

 can be made. This room has its own sink and 

 hood for such work as may be unpleasant to 

 the nose, or otherwise irritating. A large 

 and convenient work-bench occupies nearly all 

 the northern end of the room. More in the 

 centre of the room are the lathe (L) and saw- 

 table (ST), each capable of receiving motion 

 from the little steam-engine (SE), of about 

 two and a half horse-power. This receives 

 steam from the same pipes which come to the 

 steam-bath alread} 7 mentioned. The shafting 

 at present runs only a few feet into the main 

 laboratory, but can be readily extended as 

 occasion shall require. 



At the chief entrance of the main laboratory 

 and the mechanic's room is a small ante-room 

 with clothes- closets (0(7) for those regularly 

 working in the department. This room also 

 opens upon the staircase leading to the room 

 above, and to the ' gallery ' of the general 

 laboratory, these forming the mezzanine of this 

 portion of the floor. Their arrangement is seen 

 in the second plan (fig. 2). This space has 

 been left more or less open with a view to its 

 future adaptation to such needs as shall arise. 

 A portion of that over the mechanic's room will 

 probably soon be shut off by a glass partition, 

 to make a quiet reading-room which will hold 

 the working-library of the department. The 

 larger space over the small rooms has its own 

 hood and a water-supply, and is well provided 

 with gas. During the p<ist year, extended 

 experiments in bacilliculture have been carried 

 on here. A part is soon to be fitted up with 

 large plain tables for the courses in practical 

 physiology-, which are given for the students of 

 the first year in as large sections as can be con- 

 veniently managed. It would be easy at any 

 time to make this space into several separate 

 rooms, should they be required. 



At the end of the gallery proper, along the 

 wall to the west, is the battery-closet (BC). 

 This opens into its own ventilating-shaft, and 

 has two large soapstone sinks, in one of which 

 the battery plates and cups are washed, the 

 other serving to hold the porous cups kept 

 constantly under water. On shelves at the 

 side are large bottles with glass stop-cocks to 

 hold the acids and other solutions. A glass 

 case near by contains such battery-material as 

 is not in frequent use, or fails to find room in 

 the large storage-drawers below the closet. 

 Should such a necessit} 7 arise, a broad gallery 

 could also be built along the southern wall of 

 the large room. 



