Star-land; being talks with young people about the wonders of the heavens (1899)
Ball, Robert Stawell, Sir, 1840- [from old catalog] · Boston and London, Ginn & company · leaf 16
melting commences, and the poker ischanged into liquid like the penny, the lead, and thewax. Yet a little nearer you may carry the flint,which is now glowing with the same fervor whichfused the poker, but even the flint itself will have THE BURNING-GLASS. 6 to yield at last and become, not merely a… … Fig. 1. — How to use the Burning-glass. I say is true for various reasons, but I will only mentionone, which is derived from an experiment with theburning-glass, that most boys have often tried. We may use one of those large lenses that areintended for magnifying photographs. But almost anykind of…
Astronomy
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