. Nature-study; a manual for teachers and students. Nature study. i68 NATURE-STUDY (goldfishes especially) and other animals are chilled and often killed in consequence of pouring on them water taken directly from the pump or the city mains at a much lower temperature. Let the new water stand a few hours in the room before making the change, or add warm water to it till to the hand the two waters are about the same tem- perature. A siphor is useful sometimes in drawing off ths water, so as not tc disturb the bottorr and to prevent the animals from goin^ out. The following ani- mals are good fo
. Nature-study; a manual for teachers and students. Nature study. i68 NATURE-STUDY (goldfishes especially) and other animals are chilled and often killed in consequence of pouring on them water taken directly from the pump or the city mains at a much lower temperature. Let the new water stand a few hours in the room before making the change, or add warm water to it till to the hand the two waters are about the same tem- perature. A siphor is useful sometimes in drawing off ths water, so as not tc disturb the bottorr and to prevent the animals from goin^ out. The following ani- mals are good foi stocking aquaria Goldfishes (verj hardy), small bull heads, young dog fish, carp, perch small sunfish, min nows and darters, sticklebacks, salamanders, turtles, frogs tadpoles, crayfish, clams, snails, leeches, dragonfly larv-ae electric-light bugs, water-beetles, water-boatmen, water striders, water-spiders, mosquito wrigglers, and other aquatii insects. One thing must be kept in mind, however, and that is tha the carnivorous creatures are apt to eat the other smaUe. Fig. 36. Aquarium with 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 Holtz, Frederick Leopold, 1870-. New York, C. Scribner's Sons
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