174 GLATJCUS; OE, 



case was, that if the coralline were, as had often been 

 thought, a zoophyte, the water would become corrupt, 

 and poisonous to the life of the small animals in the 

 same jar ; and that its remaining fresh argued that 

 the coralline had reoxygenated it from time to time, 

 and was therefore a vegetable. 



In 1850, Mr. Eobert Warrington communicated to 

 the Chemical Society the results of a year's experi- 

 ments, " On the Adjustment of the Eelations between 

 the Animal and Vegetable Kingdoms, by which the 

 vital functions of both are permanently maintained/' 

 The law which his experiments verified was the same 

 as that on which Mr. Ward, in 1842, founded his 

 invaluable proposal for increasing the purity of the 

 air in large towns, by planting trees and cultivating 

 flowers in rooms, that the animal and vegetaUe respi- 

 rations might counterbalance each other ; the animal's 

 blood being purified by the oxygen given off by the 

 plants, the plants fed by the carbonic acid breathed 

 out by the animals. 



On the same principle, Mr. Warrington first kept, 

 for many months, in a vase of unchanged water, two 



