180 GLAUCUS; OE, 



stay in a lodging-house at the most cockney of 

 watering-places. 



Buy at any glass-shop a cylindrical glass jar, some 

 six inches in diameter and ten high, which will cost 

 you from three to four shillings ; wash it clean, and 

 fill it with clean salt water, dij)ped out of any pool 

 among the rocks, only looking first to see that there 

 is no dead fish or other evil matter in the said pool, 

 and that no stream from the land runs into it. If 

 you choose to take the trouble to dip up the water 

 over a boat's side, so much the better. 



So much for your vase ; now to stock it. 



Go down at low spring-tide to the nearest ledge of 

 rocks, and with a hammer and chisel chip off a few 

 pieces of stone covered with growing sea-weed. 

 Avoid the common and coarser kinds (fuci) wliich 

 cover the surface of the rocks ; for they give out 

 under water a slime which will foul your tank : but 

 choose the more delicate species which fringe the 

 edges of every pool at low-water mark; the pink 

 coralline, the dark purple ragged dulse (Ehodymenia), 

 the Carrageen moss (Chondrus), and above all, the 



