. Zoological Society bulletin . TERRARIUM IN A ROUND AQUARIUM JAR. Suitable for small salamanders, frogs and some turtles, land snails, etc. Similarly the light factor offers but little diffi-culty and food can easily be added in the neces-sary quantities. The problem of aeration is more difficult. Inthe natural pond, with its large surface ruffledby the breeze, this takes care of itself, as a suf-ficient amount of oxygen can be absorbed fromthe air to supply all the animals that can findfood within its waters; but in the narrow limitsof the aquarium, with its restricted surface,comparatively
. Zoological Society bulletin . TERRARIUM IN A ROUND AQUARIUM JAR. Suitable for small salamanders, frogs and some turtles, land snails, etc. Similarly the light factor offers but little diffi-culty and food can easily be added in the neces-sary quantities. The problem of aeration is more difficult. Inthe natural pond, with its large surface ruffledby the breeze, this takes care of itself, as a suf-ficient amount of oxygen can be absorbed fromthe air to supply all the animals that can findfood within its waters; but in the narrow limitsof the aquarium, with its restricted surface,comparatively greater depth, and the absence ofany agitation of the water, the absorption ofoxygen at the surface does not take place withsufficient rapidity to sustain much animal life. To supplement the surface absorption of oxy-gen, it is necessary to grow plants in the aquar-ium. It is a well known fact that in manufac-turing their own food from simple substances,plants give off oxygen as a waste product. Thisprocess takes place in the c
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
