748 



SCIENCE 



[N. S. Vol. XXXIV. No. 883 



the temperature constant within i° F. of the 

 point selected. The refrigeration is kept inde- 

 pendent of the ventilation; the air for ventila- 

 tion is cooled in the anterooms to the tempera- 

 ture of the rooms to which it is to be admitted. 

 This matter of ventilation is one of the most 

 difficult, but absolutely necessary when it is 

 intended to keep living animals for long 

 periods. The refrigeration is by the circula- 

 tion of brine in coils, automatically controlled 

 by thermostats. For the cooling of the brine 

 there are two ammonia-compressors of the 

 vertical single-acting type ; one is large enough 

 to operate the entire plant under all condi- 

 tions; the second with a capacity of half of 

 that of the first. Within constant-tempera- 

 ture rooms where living animals are to be kept 

 there are no ammonia pipes, so that there can 

 be no leakage of ammonia in the rooms. 



The direct steam heating is from a central 

 power station, as is also the electric power. 

 All lighting is by electricity. In the basement 

 is the plant (Nos. 17, 18, 19) for ventilation by 

 filtered air, and this is subdivided into sys- 

 tems so that different parts of the building 

 may be ventilated independently of each other. 

 All ventilation conduits are placed within the 

 walls lining the corridors. Steam, gas and 

 water pipes are all exposed, and so are the rain 

 conductors which are inside the building. 

 The sinks, which are in nearly every room of 

 the building, are of soapstone with an ash 

 drain board at one end; most of the sinks 

 measure one and a half by two feet, but cer- 

 tain special sinks for anatomy are much 

 larger; one of the latter is 3 feet deep and 8 

 feet long. Each bibb has an extra small cock 

 for the attachment of rubber tubing. Bunsen 

 burners are attached to gas outlets by flexible 

 wire tubing. 



All tables have birch tops, ebonized. All 

 wall cases are of oak with glass doors, and all 

 the furniture is master-keyed. Drawers and 

 trays of all standard wall cases are inter- 

 changeable. The general type of wall case is 

 four feet wide ; the upper part is provided with 

 glass doors and shelves, the lower, deeper part 

 with wooden doors and shallow drawers. The 

 usual type of preparation table has a top meas- 



uring 1| X 5 feet, and is of a convenient size 

 to move. Beneath the built-in window tables 

 there are no drawers, so that one may work 

 at any part of them. All chemical hoods have 

 wooden frames in order that the glass may be 

 readily replaced when broken. 



The ofiice room (No. 102) is on the first 

 floor between these two entrances that are 

 most used; it is occupied by the stenographer, 

 who also acts as telephone central and keeps 

 student records. There is an intercommuni- 

 cating telephone system with twelve stations, 

 at any of which a person may call up any sta- 

 tion independently of the telephone central. 

 A room (No. 103) for the janitor is placed 

 near the main entrance. For freight there is 

 a room (No. 8) in the basement and also a 

 large space (No. lOA) beneath the seats of 

 the auditorium. 



For the use of the men students are two 

 locker rooms in the basement, with vertical 

 lockers of expanded metal, adjoining which 

 is a large lavatory (No. 2) and a smoking 

 room (No. 4). There is a separate toilet for 

 janitors (No. 7). For women is provided a 

 locker and sitting room (No. 108) on the first 

 floor, with lavatory (No. 107) contiguous. 

 On the second and third floors are other 

 toilet rooms (Nos. 211, 310), that of the sec- 

 ond floor provided with a bath for the con- 

 venience of any investigator who chooses to 

 reside in the building. 



The whole building has been made as 

 elastic as possible so as to provide for future 

 needs. Partitions between rooms are of terra 

 cotta and may be easily removed ; it will prove 

 cheaper to tear down partitions so as to 

 make larger rooms when necessary than to 

 have large rooms at the start and later erect 

 partitions in them. 



Thomas H. Montgomery^ Jr. 



Univeesitt of Pennsylvania 



tu:e chemist as a conservationist 



It is remarkable, if one has not given the 

 matter serious consideration, to what extent 

 the chemist is interested and concerned in the 

 conservation movement, that has recently been 

 agitated in this country. This was especially 



