I I 88 OYSTERS, AND ALL ABOUT THEM. 



The principal essentials necessary for the insured 

 success of Oyster Culture are :- 



1. The selection of the best kind of oysters to breed 

 from. 



2. The preservation of the spat after its exudation 

 from the parent shell ; 



(i.) In preventing the tide from washing it away. 

 (2.) In guarding it from frost, sand, mud, bad 

 weather, sudden changes of temperature, and diseases 

 of infancy. 



(3). In supplying suitable objects for it to adhere 

 to, such as fascines, culch, tiles, &c. 



(4.) In purifying the element in which it lives, and, 

 since it is in continual danger of being devoured by its 

 numerous enemies, the water shall be composed (in 

 equality of mixture) of the necessary ingredients, not 

 only with regard to the food of the oyster, but also to 

 the requirements FOR THE FORMATION OF SHELL. 



It is to this plentiful commixture of carbonate of lime 

 in Lake Fusaro that that famous oyster bed owes its never- 

 failing and considerable productivity. And, " among the 

 many reasons why certain artificial oyster-farms soon 

 become exhausted and barren, may be the fact of their 

 being placed in waters where the calcareous supply is not 

 equal to the demand made upon it by these lime-loving 

 bivalves." Thus writes Mr. J. Lawrence Hamilton, in the 

 British Medical Journal, Feb. 15, 1890, and the experi- 

 ments of Drs. Pouchet and Chabry (Brit. Med. Journal, 

 Jan. 25, 1890,) undeniably confirm that gentleman's con- 

 jecture. 



The Professors mentioned recently conducted some 

 experiments of great biological interest. " They have 

 reared larval germs of sea-urchins in artificial sea-water 



