Secrets of wise men, chemists and great physicians (1889)
David, Wm. K. (William King) · Chicago : Wm.K. David · leaf 102
Figs. 2a and 26 show another and simpler arrangement, in whichonly one train of clockwork is used. On the same axle as H is fixed alever and weight, W, to balance the arm. A vertical rod, X, having aprojection, Z, slides up and down in guides, Y Y, and carries the catgutS and T. The quadrant, B ,… … FIG.I.b. lower part of X is connected direct with O. When X is slightly raised,as shown, A is free to move, but on exhausting air and drawing X downZ enters the cogs and stops the hand over a card; continuing to exhaustthe thumb closes and the card is lifted up. The details of the clock-work I…
Recipes · Tricks · Medicine -- Formulae, receipts, prescriptions
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