Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 130
ANCIENT INVENTIONS OPERATED BY AIR PRESSURE. More than two thousand years ago, Hero (or Heron),a philosopher and mathematician of Alexandria, inventedthe fountain shown in the annexed enp-raving-. This device. GASES. 107 Fig. iio< … Heros Fountain. I08 EXPERIMENTAL SCIENCE. because of its antiquit}, as well as its simplicity and com-pleteness, is very interesting and instructive. As represented in the engraving, it may be classed withtoys, or at most regarded as only an apparatus for illustratinga scientific principle; but it…
Physics · Lantern projection · Electric apparatus and appliances
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