746 



SCIENCE 



[N. S. Vol. XXXrV. No. 883 



utilizing a space not well adapted for other 

 purposes. This has 327 seats without writing 

 arms, with only a moderate rise in their tiers, 

 and four aisles; beneath the large skylight is 

 a system of vertical shutters that may be 

 turned horizontal, so as to exclude the light, 

 by the revolution of a wheel placed beneath 

 the blackboard. The smooth plaster wall above 

 the blackboard furnishes a lantern screen, 

 11 X 11 feet. A small lecture room (No. 212) 

 is placed on the second floor, to accommodate 

 sixty students, with separate chairs fitted with 

 writing arms. But lectures may be given in 

 any laboratory room, for all have blackboards. 



Nearly opposite the smaller lecture room is 

 a room for charts (No. 206) ; this contains a 

 metal rack on which Leuckart and DeyroUe 

 charts are hung vertically by hooks. 



The library (No. Ill) is at the west end of 

 the first fioor, and measures 24 X 44 feet. It 

 is fitted with five double-range metal stacks, 

 and a folio stack; one end of it is a reading 

 space. Adjoining it is a librarian's room 

 (No. 110). The library is to be entered from 

 the librarian's room, so as to prevent ingress 

 of dust from the hallway. 



No large museum rooms were planned, only 

 a synoptical museum and rooms for the stor- 

 age of anatomical collections. It was not 

 thought wise to duplicate in any way the ex- 

 hibition collections of the museums of Phila- 

 delphia, but to make the building strictly a 

 working laboratory. 



For the elementary courses in general zool- 

 ogy, four laboratories are provided on the first 

 floor, accommodating ninety-six students at 

 one time. The laboratories for general zool- 

 ogy (Nos. 104, 114, 115, 117) and the audi- 

 torium (No. Ill) and synoptical museum 

 (No. 101) which are auxiliary to this course, 

 are all placed on the first floor so as to segre- 

 gate the majority of the students there, and 

 to avoid noise on the stairways. Only as the 

 students proceed to more advanced courses will 

 they pass to the other floors, and thereby as- 

 cend the heights of learning. It was not 

 thought necessary to provide any special prep- 

 aration rooms for the course in general zool- 

 ogy, because each laboratory has its own sinks 



and preparation tables, besides a demonstra- 

 tion table on castors that may be readily 

 moved from one room into another; there are 

 no sills beneath the doors. 



On the first floor, also, is a laboratory for 

 entomology (No. 112), and opposite it one 

 (109) for advanced work on this subject. 



For vertebrate anatomy there are two lab- 

 oratories (Nos. 215, 216) for elementary 

 courses on the second floor, each with two 

 large sinks; these are separated by a sliding 

 accordion partition, so that they may be 

 thrown into one when necessary. Adjoining 

 these is a small room (No. 214) for charts and 

 models and a preparator's room (No. 213) ; 

 the latter has a chemical hood and a very 

 large sink. Contiguous is also a storage mu- 

 seum (No. 217) with a large wall case for 

 larger mounted skeletons, and a series of 

 vertical cases provided with interchangeable 

 trays and drawers and with lift-off wooden 

 doors fitting almost dust-proof ; the latter cases 

 are for alcoholic and other specimens. Another 

 part of the anatomical equipment are two 

 storage rooms (Nos. 12, 13) in the basement 

 for rough collections, and a special prepara- 

 tion room (No. 11) communicating with 

 these; the latter has a specially designed hood 

 for maceration and boiling of skeletons, a 

 large slate table with running water, a heating 

 and drying table, a sink large enough to con- 

 tain the body of a horse, and an overhead 

 trolley track for the carriage of large objects. 



For elementary work in histology and em- 

 bryology there are two laboratories (Nos. 205, 

 224) on the second floor. For more advanced 

 courses, especially in cytology and embryology 

 there are two smaller laboratories (Nos. 222, 

 219) on the same floor, one of these being 

 fitted with an aquarium table. 



For protozoology there is one laboratory 

 (No. 226) for elementary work, and opposite 

 it a culture room (No. 201) with southeast ex- 

 posure provided with an aquarium table. 



All these courses demanding much micro- 

 scopical work are close together and conve- 

 nient to the special room (No. 202) for paraf- 

 fine baths and sterilizers, and to the reagent 

 room (No. 203), which has a chemical hood 



