burning glass

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burning glass

n
(General Physics) a convex lens for concentrating the sun's rays into a small area to produce heat or fire
References in classic literature ?
That unblinkingly vivid Japanese sun seems the blazing focus of the glassy ocean's immeasureable burning-glass.
I took out my small provisions and after having refreshed myself, I secured the remainder in a cave, whereof there were great numbers; I gathered plenty of eggs upon the rocks, and got a quantity of dry sea-weed, and parched grass, which I designed to kindle the next day, and roast my eggs as well as I could, for I had about me my flint, steel, match, and burning-glass.
Meantime I rolled bread pills and remembered my sins; M'Leod considered his own reflection in a spoon; his wife seemed to be praying, and the girl fidgetted desperately with hands and feet, till the darkness passed on--as though the malignant rays of a burning-glass had been shifted from us.