by Bertha M. Clark
Publisher: American Book Company 1912
Number of pages: 384
From the contents: temperature and heat, burning or oxidation, food, water, air, general properties of gases, light, refraction, photography, color, the power behind the engine, pumps and their value to man, the water problem of a large city, fermentation, bleaching, dyeing, chemicals as disinfectants and preservatives, drugs and patent medicines, nitrogen and its relation to plants, sound, musical instruments, speaking and hearing, electricity, some uses of electricity, modern electrical inventions, magnets and currents.
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