GROWTH OF CORAL. 



225 



BRANCHING CORAL. 



can be no doubt that some localities and positions 

 are more favourable to the growth of coral than 

 others. t)r. Allan, while at Madagascar, made 

 several experiments to test this. He selected seve- 

 ral masses of coral, each weighing about ten pounds, 

 and of different species. These he placed three feet 

 below the surface of the sea, and staked them in 

 to prevent removal. In a little more than six months 



(4510 15 



