CHAPTER II 
THE AQUARIUM AND ITS MANAGEMENT. 
Restless forms of living light, 
Quivering on your lucid wings, 
Cheating still the curious sight 
With a thousand shadowings ; 
Various as the tints of even, 
Gorgeous as the hues of heaven, 
Reflected on your native streams 
In flitting, flashing, billowy gleams. 
Harmless warriors clad in mail 
Of silver breastplate, golden scale ; 
Mail of nature's own bestowing, 
With peaceful radiance mildly glowing ; 
Keener than the Tartar’s arrow, 
Sport ye in your sea so narrow. 
Hartley Coleridge 
T HE tank now to be described was fitted and furnished a good many 
years ago. It is a simple rectangular vessel, in form nearly a double 
cube, and its position is in the entrance-hall adjoining the rear wall, 
where it is sufficiently illuminated to render every part of its contents agree¬ 
ably visible to the eye, yet it receives scarcely any direct light whatever. It 
is impossible there should be anything more simple than the furnishing of this 
vessel, yet it does not lack certain features that render it attractive to 
