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He is likewise stated to have set their vessels on fire by burning-glasses; this, however, rests upon modern authority, and Archimedes is rather believed to have set the ships on fire by machines for throwing lighted materials. After the storming of Syracuse, Archimedes was killed by a Roman soldier, who did not know who he was.
Let us transform and amplify that power and we encompass destruction. The air is filled with energy. A sun-ray is energy; you will recall that Archimedes concentrated it through immense burning-glasses which set fire to Roman ships." His voice had grown clear and strong, as though he was lecturing to a class of students.
The telescope, burning-glasses, and gunpowder, are discoveries which may well carry his fame to the remotest time, and make the world blind to the one spot of folly the diagnosis of the age in which he lived, and the circumstances by which he was surrounded.
Grostete and the more enlightened men of the university provided him with means to carry on his experiments, and, in twenty years he had expended no less than L2,000: but not without mighty results; for he ascertained the true length of the solar year, made many useful discoveries in chemistry and medicine, and anticipated many of the modern uses of glass, learning the powers of convex and concave lenses for the telescope, microscope, burning-glasses, and the camera obscura.
The truth of these two extraordinary facts is invalidated by the silence of the most authentic historians; and the use of burning-glasses was never adopted in the attack or defence of places.
"The sun's rather strong down here, Helena, and if you're not careful you'll scorch your neck with those burning-glasses you've got in your ears." "Don't I look nice?" demanded Helena, with a pout. "You bet you do!" said Madison earnestly. "You've got the swellest thing on Broadway beaten from Forty-Second Street to the Battery. Now, here you are" they had halted before the Patriarch.
For the sunbeams communicate no heat in their passage through transparent bodies, with which they do not combine, as the air continues cool even in the focus of the largest burning-glasses, which in a moment vitrifies a particle of opaque matter. IV. Of the Organ of Hearing.
Even where I was, the untempered rays of the sun scorched me, and I knew that within two or three hundred thousand miles of the solar surface the heat must be sufficient to melt the hardest rocks. I was aware that experiments with burning-glasses had sufficiently demonstrated that fact. But perforce I resigned myself to my fate. At any rate it would the sooner be all over.
He had made experiments with Greek fire and the magnet; he had constructed burning-glasses, and lenses of various power; and had practised with multiplying-mirrors, and with mirrors that magnified and diminished.
He turned in the direction, shouted, but received no answer. When he looked back the red eyes were gone. Then Merlin moved forward of his own accord, but ere he had gone far, the eyes were visible again, glaring at the rider from the wood. This time they approached, dilating, and increasing in glowing intensity, till they scorched him like burning-glasses.
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