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Impression from a woodcut of a small portion of Mr. Babbage’s Difference Engine No. 1, the property of Government, at present deposited in the Museum at South Kensington. It was commenced 1823. This portion put together 1833. The construction abandoned 1842. This plate was printed June, 1853. This portion was in the Exhibition 1862.
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Five black circles in a row.
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Five black circles in a row, the second to fourth having a further two black circles below each arranged in a pyramid.
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Five pyramids of black circles, starting with a single circle and each successive pyramid growing by one row.
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Four cards in a row with four spaces for holes to punched, labelled +, −, × and ÷. The first card has every hole but the fourth unpunched, the second all but the third, the third all but the second, and the fourth all but the first.
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A diagram demonstrating how two tubes joined by rods will affect the light of a candle from different viewpoints, when placed so as to cover it.