


















A FEW SEA-WORMS. 267 
to quote Mr. Gosse once more (p. 259), “thousands of tiny 
globules forming on every plant, and even all over the 
stones, where the infant vegetation is beginning to grow; 
and these globules presently rise in rapid succession to the 
surface all over the vessel, and this process goes on uninter- 
tuptedly as long as the rays of the sun are uninterrupted. 
“Now these globules consist of pure oxygen, given out by 
the plants under the stimulus of light; and to this oxygen 
the animals in the tank owe their life. The difference be- 
tween the profusion of oxygen-bubbles. produced on a sunny 
day, and the paucity of those seen on a dark, cloudy day, or » 
ina northern aspect, is very marked.” Choose, therefore, a 
south or east window, but draw down the blind, or throw a 
handkerchief over all if the heat become fierce. The water 
should always feel cold to your hand, let the temperature 
be what it may. 
Next, you must make up for evaporation by fresh water. 
A very little will suffice, as often as in summer you find the 
Water in your vase sink below its original level, and prevent 
the water from getting too salt. For the salts, remember, 
do not evaporate with the water, and if you left the vase in 
the sun for a few weeks, it would become a mere brine-pan. 
—From Kingsley’s Glaucus, or the Wonders of the Shore. 

A FEW SEA-WORMS. 
BY A. S. PACKARD, JR. 
i sea-side readers may simply shrug their shoulders in 
aat: the prospect of becoming acquainted with crea- 
