Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 37
breast,and the other end, which ispointed, into a hole in a pieceof wood. Bending the stick bythe pressure of his body, heseizes the curved part, turns it rapidly round, and thus pro-duces fire. In Australia and Tasmania fire is evoked asshown in fig. 3 by the rapid twirling of a pointed… … LECT. r. MECHANICAL HEATING OF AIR. 18 With the band t, t (fig. 4), from a whirling table, insteadof a thong held in the hand, I will endeavour to show youthis production of heat. Pressing by means of a piece ofwood c, a pin, p of beech, mulberry, or some other wood,into a hollow formed in a slab…
Heat
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