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Title: Burning-lens (diam 7/8 in) combined with a fire-steel (lengt [Go to resource]
Description: Burning-lens (diam 7/8 in) combined with a fire-steel (length 3 1/8 ins); the lens is enclosed in the hand-hold of brass at back of steel, from which it opens out on a hinge. ? France or Spain. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1937-682/1214 Go to resource More Like this...
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