b POPULAR HISTOllY OP THE AQUARIUM. 



' Annals of Natural History^ the results of his early essays 

 in the way of Marine Aquaria, commenced a year sooner. 

 The difficulties here were greater, but have been all over- 

 come by perseverance; and side by side with the fresh- 

 water tank is now to be seen the first marine tank, with 

 marine plants and animals in full health. And this, as 

 being the first, is more interesting than many others 

 which its proprietor has since constructed. Obtaining 

 salt-water from oyster-boats at BiUingsgate, which was 

 taken from tlie middle of the English Channel, Mr. War- 

 rington placed it in a tank, and then introduced red and 

 brown seaweeds, which, not answering the purpose, were 

 exchanged for green weeds, which answered better. Speci- 

 mens of Enteromorplia and Viva attached to nodules of 

 flint or chalk were procured from Broadstairs, and several 

 anemones, with a few periwinkles, introduced with them 

 into a small tank, and then into a shallow pan. A few 

 more were added, and thus a number of living specimens 

 were kept in a healthy condition to the close of the year. 

 The first tanks were made, for fresh-water subjects, with 

 straight sides ; and these tanks were, in the first instance, 

 used for the marine experiments; but when these were 

 sufficiently advanced, Mr. Warrington had a new one made 



