OR, THE HOME-CULTURE OF FRESH-WATER PLANTS. 
in its practical form, and npon 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- 
13 
