MAY. 101 



and shallow water near weed-covered rocks is an education 

 in itself, and one can learn more in this way than by much 

 reading. And the rock pools on the coast are themselves 

 microcosms, a whole world of life lying hidden in their 

 nooks. And then special forms can be watched in small 

 aquaria, and much knowledge thus be gained of their 

 structure and habits. It takes some practice to keep an 

 aquarium, but there is no real difficulty ; it is only the 

 matter of a few simple experiments and a little patience, 

 and it becomes easy enough. 



