Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 125
dolph Hertz(1857-1894) One of the most brilliant of Ger-man physicists, who, in spite of hisearly death at the age of thirty-seven, made notable contributionsto theoretical physics, and left be-hind the epoch-making experimen-tal discovery of the electromagneticwaves predicted by Maxwell. Wire-less… … Gas Mask A great variety of poisonous gases having a density greater than air were set freeand carried by the wind against the Allied armies in the World War, and otherswere fired in exjilosive shells. Until gas masks were devised these gases, settlinginto the trenches, wrought frightful havoc…
Physics
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