. First lessons in zoology. Zoology. REHIRING ANIMALS AND MAKING COLLECTIONS 333 if the animals in it live naturally in quiet water. Among the more available plants for use in aquaria are the fol- lowing: " Waterweed, Elodea canadensis. " Bladderwort, Utriciilaria (several species). " Water-starwort, Callitriche (several species). "Watercress, Nasturtium officinale. " Stoneworts, Cliara and Nitella (several species of each). " Frog-spittle or water-silk,' Spirogyra. " A small quantity of duckweed, Lenina, placed on the surface of the water adds to the beauty
. First lessons in zoology. Zoology. REHIRING ANIMALS AND MAKING COLLECTIONS 333 if the animals in it live naturally in quiet water. Among the more available plants for use in aquaria are the fol- lowing: " Waterweed, Elodea canadensis. " Bladderwort, Utriciilaria (several species). " Water-starwort, Callitriche (several species). "Watercress, Nasturtium officinale. " Stoneworts, Cliara and Nitella (several species of each). " Frog-spittle or water-silk,' Spirogyra. " A small quantity of duckweed, Lenina, placed on the surface of the water adds to the beauty of an Fig. 253. —Battery-jar aquarium. (From Jenkins and Kellogg. " When it is necessary to add water to an aquarium on account of loss by evaporation, rain water should be used to prevent an undue accumulation of the mineral-water held in solution in other ; Making collections.—Much is to be learned about animals by "collecting" them. But the collecting. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1903
