Life Beneath the Waves. 15 



ferring to the plan it will be seen that the 

 length of the corridor is broken by a central 

 square, on the sides of which are the largest 

 tanks in the building ; the enclosed sketch re- 

 presenting the larger of the two. It may here 

 be stated that the corridors throughout are 

 divided into a series of bays of equal propor- 

 tions ; these divisions have Portland stone 

 piers, plinths, and cills to receive the sheets 

 of thick plate glass, which are secured to 

 them with waterproof cement ; exhibiting 

 a front of water behind each division of 

 glass, nine feet in length, and five feet six 

 inches in height ; and a glass roof covers 

 the tanks, so as to admit a sufficiently strong 

 light upon the inhabitants. 



The central square has the groined 

 vaulted roof on each side, forming a sort 

 of cloister, whilst the middle is covered 

 with an elaborately ornamented iron roof, 



