OCEAN GAEDENS, ETC. 



he procured by furnishing the steward or captain of 

 any Thames steamer, or the guard of a railway in. 

 connection with the coast, with a clean barrel ; the 

 charge, in either case, for carriage and trouble, 

 would not exceed two or three shillings. 



The artificial salt water has been found sufficient 

 for Zoophytes, but not for fish and other of the 

 higher class of marine animals, except for a certain 

 given time. 



The composition for artificial sea- water is as 

 follows :— 



Common salt . . . . 3J oz. 



Epsom salts ..... J oz. 



Chloride of magnesium . 200 grs. 



Chloride of potassium . , 40 grs. 

 To these are added four quarts of water, and 

 when the salts are thoroughly dissolved, say on the 

 following day, the liquid must be filtered through a 

 sponge ; it is then fit for use. 



Care must be taken to observe whether, when 

 the sun shines and the light is bright, the silvery 

 bubbles of oxygen form upon the fronds of the 

 marine vegetation ; and if not, it is certain that the 

 marine plants are not in a healthy state, and must 

 be renewed, 



Mr» Gosse gives the following final directions as 



107 



