FOR PLEASURE AND PROFIT. 



43 



fore, if at all exposed to the rays of the sun, with no counter- 

 acting influence such as plenty of shade from trees, or water 

 that runs at ai very low temperature, even in summer time, 

 they should present as little surface to the action of the sun 



.. > 

 A REARING POND. 



as possible, i.e., they should be deep and narrow. Shade may, 

 and should be, supplied by the growth cf aquatic plants, and 

 by placing shading screens at intervals across the pond (see 

 chapter on " Rearing Fry and Yearlings ") ; but depth and 

 narrowness are the great preventives of your pond warming 



