OR, THE HOME-CULTURE OP FRESH- WATER PLANTS. 



in its practical form, and upon true and distinctly 

 announced principles. 



Mr. "Ward had, it is true, described in 1849 his 

 success in growing marine plants in artificial sea- 

 water, which established another interesting feature 

 connected with the establishment of Aquaria, though 

 it had been previously proved by Dr. Johnston's 

 experiment. He did not, however, make any state- 

 ment in reference to the necessity for plants to 

 sustain animal life in Aquaria, leaving it to Mr. 

 "Warrington, who had been so completely successful 

 in his fresh-water experiment, to turn his attention 

 to the establishment of a marine tank upon similar 

 principles, in which he has been also more tho- 

 roughly successful than any other operator. Many 

 have since followed in the track of the pioneers 

 I have named, among the most distinguished of 

 whom the names of Mr. Gosse and Dr Badham 

 stand pre-eminent. 



Experiments of a different class, which were in 

 the main pure Aquaria, had been long in operation. 

 Such, for instance, as the Vivarium described by 

 Mr Jesse, at Hampton Court, in which many kinds 

 of fish were kept alive and in a healthy state. This 

 happy result, however, was accidental, and arising 

 from the size and situation of the Vivarium in ques- 



