December 1, 1911] 



SCIENCE 



1^1 



and is for the housing of all general glassware 

 and reagents. 



On the third floor at the east end is the sec- 

 tion for physiology. This comprises a large 

 private room (No. 301) with a hood, rigid 

 table for a motor and chemical table; a labora- 

 tory (No. 330) for elementary work, with a 

 hood; a glassware and apparatus room (No. 

 302) ; a room (No. 329) for motors ; and a 

 biochemical laboratory (No. 303) completely 

 outfitted with a large hood and two chemical 

 tables, and enclosing a balance room parti- 

 tioned off by glass. For the most precise 

 weighing there is a small room (No. 3) in the 

 basement with a built-in pier. A laboratory 

 (No. 319) for animal behavior is placed on the 

 third floor. For the use of both these subjects 

 there are two rooms painted dull black for ex- 

 periments on reactions to light; one (No. 313) 

 of these is on the third floor, intended espe- 

 cially for the study of the effects of sunlight, 

 and the second (No. 6) considerably larger, is 

 in the basement and provided with built-in 

 piers for the placing of delicate physical appa- 

 ratus, and with an anteroom (No. 5) for light 

 generators. 



Of other general equipment the following 

 may be briefly described: . 



For photography there is a dark room (No. 

 9) in the basement for the special use of stu- 

 dents. The main space for this purpose, how- 

 ever, is a large room (No. 313) on the third 

 floor, with a skylight over a portion of it, 

 communicating with which are three dark 

 rooms (Nos. 315, 316, 317), one of them espe- 

 cially large for work with the ultra-violet 

 apparatus; and adjoining is a room (No. 314) 

 for microphotography, also with a dark room 

 (No. 318). 



In the basement is a machine shop (No. 21) 

 well equipped with metal- and wood-working 

 machinery (lathes and drill presses) for the 

 repair and making of apparatus. 



For breeding and other experimental work 

 there are considerable facilities. Within the 

 new building are no aquaria provided beyond 

 special aquarium tables in two rooms. The 

 old vivarium is now devoted almost entirely to 

 aquaria, is well equipped with tanks and pools 



for fresh water, and with a smaller section for 

 salt water; two new shallow floor pools have 

 been added to it. The wing connecting the 

 vivarium with the new laboratory consists of 

 a keeper's room (No. 120) and of two breeding 

 rooms (Nos. 118, 119) for mammals, the latter 

 with outside wire-enclosed runs; there is 

 another wire enclosure south of the vivarium; 

 the hallway leading to the mammal rooms is 

 closed off from the main south corridor by a 

 special door so as to exclude odors. This 

 mammal wing is raised well above the ground 

 level so as to insure dryness, and is well venti- 

 lated. 



The large room (No. 105) at the southeast 

 corner of the south wing, immediately adjoin- 

 the mammal wing, is also designed for 

 breeding purposes, particularly for insects, and 

 so is room No. 109 on the same floor. In the 

 basement is a room (No. 20) on the north side 

 for the incubation of hens' eggs. On the third 

 floor are three large rooms (Nos. 305, 306, 

 311) in the south wing for the future exten- 

 sion of breeding facilities. All these various 

 breeding rooms have drained cement floors. 

 On the east side is a ground area enclosed on 

 three sides by the walls of the building, and it 

 is planned to screen this off for outdoor breed- 

 ing. 



There are four constant temperature rooms. 

 Room No. 15 of the basement is for the cold 

 storage of anatomical material, to be kept at 

 a temperature ranging from 28° to 32° F. 

 Separated from it by a partition is room No. 

 15A, which measures 5 X 12 feet, and is for 

 cold constant temperature of from 14° to 

 32° F. Room No. 16 is for the cooling ma- 

 chinery and room No. 14 for the large brine 

 tank. On the second floor is room No. 204 for 

 constant body temperature, to be heated by the 

 radiation from a gas stove. Room No. 304, on 

 the third floor, is designed to be set constant 

 at any temperature between 32° and 98° F. ; 

 it allows the admission of sunlight through 

 the roof, the light passing through a basin of 

 running water. All rooms and anterooms are 

 thoroughly insulated with nonpareil corkboard 

 and provided with Stevenson refrigerator 

 doors. It is designed in each room to keep 



