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1834.
Babbage's Calculating Engine.
293
riage rendered necessary by the addition which has just taken place.
The second quarter of a turn of the moving axis, will move forward through one division all the dials which in Fig. 2 are marked (*), and the scheme will be converted into the scheme expressed in Fig. 3.
Fig. 3.
In third quarter of a turn, the dial A1, fig. 3, will remain unmoved, since is at the index below it; the dial B1 will be moved forward through three divisions; C1 through nine divisions, and so on; and in like manner the dials of the row D3 will be moved
