98 DESCRIPTION OF THE LABOEATORY AT PLYMOUTH. 



is in tlie centre of tlie east face of tlie block, it leads 

 into a passage from whicli direct communication with the 

 aquarium is provided. A staircase 7 feet wide leads to 

 the first floor. A back door is placed on the north side. 



First Floor, WestBlock. — The rooms on this floor (Plate II) 

 are 11 ft. high. The staircase opens onto a landing above 

 the entrance hall, and from this point a staircase commu- 

 nicates with the second floor, and a passage 6 ft. wide 

 leads into the main laboratory. On the north side of this 

 passage is the Physiological Laboratory, 20 ft. 6 in. by 

 16 ft. ; on the south side the Chemical Laboratory, 22 ft. 

 by 14 ft., and a small room communicating with the latter, 

 8 ft. by 14 ft., which is designed to serve as a photo- 

 graphic room. These two laboratories are entered through 

 doors which open into the passage. At the end of the 

 passage a door leads into the 



Centre. — The main laboratory occupies the whole of the 

 first floor of this portion of the building. It is provided 

 with seven large windows on each side, which reach from 

 a point 2 ft. 6 in. from the floor to a height of 10 ft. from 

 the floor. The roof is a collar-beam roof with tie-rods 

 leading down to the feet of the principals. It is 16 ft. 

 from the floor to the ceiling along the centre of the room. 

 The floor is especially constructed of Dennett's arching to 

 ensure freedom from vibration as much as possible. 



East Block. — The rooms on this floor are a dining room, 

 pantry, and study for the Superintendent, and an office 

 from which a door leads directly into the main laboratory. 



Second Floor, West Block. — The rooms on this floor 

 (Plate lY) are 10 ft. high. The staircase and passage are 

 the same as on the first floor. On the north side of the 

 passage is a lavatory, 16 ft. by 8 ft., for the convenience of 

 workers in the laboratory, and a private workroom, 16 ft. 

 by 12 ft., while the whole of the south side is occupied by 

 the library, a room 30 ft. 6 in. long and 16 ft. wide. 



East Block. — This floor is occupied by bedroom accom- 

 modation, &c., for the Superintendent and his servant. A 

 small staircase 2 ft. wide will lead from the second floor 

 on to the flat roofs of each block. 



