. Nature-study; a manual for teachers and students. Nature study. i66 NATURE-STUDY Take the pupils out to the pond, brook, lake, or river, and collect the things to be put into the aquaria. This should be more than a mere collecting trip. Have the children note as far as possible the conditions under which the creatures live, perhaps the food needed, the depth of the water in which they live, etc. This will teach them something of the habits of the creatures, which should be utihzed in fitting up the aquarium. Gather some of the plants among which the animals live, perhaps some of the dead lea
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. Nature-study; a manual for teachers and students. Nature study. i66 NATURE-STUDY Take the pupils out to the pond, brook, lake, or river, and collect the things to be put into the aquaria. This should be more than a mere collecting trip. Have the children note as far as possible the conditions under which the creatures live, perhaps the food needed, the depth of the water in which they live, etc. This will teach them something of the habits of the creatures, which should be utihzed in fitting up the aquarium. Gather some of the plants among which the animals live, perhaps some of the dead leaves and twigs at. Fig. 35. Aquaria. the bottom of the water, as these will furnish food or natural shelter for the animals. In case of most aquatic insects a mud or ooze bottom seems best for their aquarium. The water from the pond whence they came also is often better than well or city water. For fishes and clams the bottom may be of clean sand. Pretty stones and pieces of coral and seashells placed in the aqua- rium will make it more attractive. The best way to keep the water fresh and supplied with oxygen is to place in it green aquatic plants. These give off oxygen in the sunlight. This is often seen in a jar with a mass of green algae in the water when the sun is shining on it. There are small bubbles of oxygen upon the mass. Small aquaria, with not too many animals, may be kept for months. 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 work.. Holtz, Frederick Leopold, 1870-. New York, C. Scribner's Sons