252 THE TANK. 



animals appreciable to the senses, provided they 

 be well selected, and a sufficient growth of plants 

 established. 



I have also another tank with a sloping back, 

 made on Mr. Warington's plan. It is of zinc, with 

 the back and two sides of slate, the front and two 

 front-sides alone being of glass. Its form is six- 

 sided, the front resembling a bow window; it is 

 three feet long by one foot ten inches in greatest 

 width, and the same in depth ; the peculiarity is that 

 the back slopes inward, so that the bottom is but 

 eight inches wide. I cannot commend this form ; its 

 appearance is lumbering and inelegant ; the opacity 

 of the back and sides throws the interior into a degree 

 of darkness, (even though placed in a south window,) 

 which greatly impedes observation ; and I cannot see, 

 by comparison with my others, which are of glass all 

 round, that the advantage anticipated, of admitting 

 the light only from above, is real, or at least of 

 sufficient importance to compensate the uninviting 

 gloominess alluded to. Its depth also is too great ; 

 a foot of water is as much as is needful for a parlour 

 Aquarium. 



The tanks at the Zoological Society's Gardens are 

 constructed by Messrs. Sanders and Woolcott, of 

 Guilford Street. They make Aquaria from eight feet 

 in length to sixteen inches, and eitlier with all the 

 sides of glass, or with slate ends. The bottom is of 

 slate, and the frame-work of iron. Their tanks are 

 excellently made, and their prices reasonable. The 

 engravings on the opposite page represent some of 

 their forms. 



