104 DESCRIPTION OF THE LABORATORY AT PLYMOUTH. 



into the Chemical and Physiological Laboratories, the library 

 and the Superintendent's office and living rooms. These 

 pipes are cased in, fresh air is admitted within the casing 

 through perforated bricks, and is distributed into the rooms 

 through short vertical shafts placed against the wall at 

 intervals. The top of each shaft is provided with a valve 

 which can be regulated as desired and through it the warm 

 air enters the room. The aquarium is warmed by means of 

 hot-water pipes lying in a trench covered with iron grating 

 along the passages between the three rows of tanks (Plate 

 I, a). 



Ventilation is provided for by means of shafts in the 

 walls dividing the central portion from the two end blocks, 

 into which the foul air from the top of the rooms is con- 

 ducted through grids. The up- draught in these shafts may 

 be assisted by means of gas burners placed within them. 

 Ventilation in the main laboratory is assisted by means of 

 revolving ventilators (Plate IV, e) placed in the roof. 



CORRESPONDENCE AND SHORT NOTES. 



Communications addressed to the Honorary Secretary of 

 the Association will, if suitable, in future numbers of the 

 Journal be published under this heading. 



OFFICIAL NOTICES. 



The Council has appointed Mr. J. T. Cunningham, M.A., 

 F.R.S.E., Fellow of University College, Oxford, to the post 

 of Naturalist at the Plymouth Laboratory. There were 

 four applications for the post. Mr. Cunningham has for 

 several years acted as Superintendent of the Scottish 

 Marine Station on the Firth of Forth, under the direction 

 of Mr. John Murray, of the " Challenger " Expedition. 



