3^8 



RECREATION 



Sea anemones must be fed with the 

 soft portion of a clam or oyster. Take 

 a little at a time on the end of a slender 

 rod, tapered to a point, and place it 

 carefully in contact with the tentacles, 

 near the centre of the disk, where the 

 mouth is situated. Corals will require 

 it chopped very fine. Crabs and shrimp 

 will take it from the bottom. It is well 

 to accustom them to come to a particu- 

 lar location each time. 



Anemones are apt to move out of 

 sight to the back of the aquarium ; but it 

 is best to keep them in view and there- 

 by avoid possible trouble. It is very 

 difficult to give any practical rule as 

 to the number of animals to stock a 

 marine aquarium. Use plenty of Ulva 

 and take care that it is in good condi- 

 tion. The beginner is apt to use too 

 much animal life at first. Again, I 

 caution the reader: "be careful." Try 

 a few specimens at first, watch the con- 

 dition of the water and animals. Prac- 

 tical experience is the best teacher. Do 

 not be discouraged if some of the fishes 

 and other animals should die. Many 

 die in their natural habitat. You will 

 surely be rewarded with success by 

 persistent effort. 



The student of biology will find a 

 varied and fertile field for study in the 

 life which can be maintained in a 

 salt water balanced aquarium. The un- 

 expected oftens appears. By close ob- 

 servation, perhaps months after stock- 

 ing, some of the species of hydroids, 

 annelids, acidians, and small crusta- 

 ceans may be discovered, none of which 

 had been at first seen. 



For those who desire it, here is 

 Gosse's formula for making artificial 

 sea-water : 



Common Table Salt 81 parts. 



Epsom Salts 7 



Chloride of Magnesium . 10 



Chloride of Potassium . . 2 



Total 100 



One pound of this mixture, carefully 

 dissolved in water, and then filtered, 

 will make about three gallons of sea 

 water. 



SALT WATER BALANCED AQUARIUM 

 With two kinds of anemones and living coral. 

 The plant beneath is the common rockweed. 



