Scientific American Volume 21 Number 20 (November 1869) . en by thethumb and finger, but which made the North Star, a long, nar-row river boat, almost tarn on her centre, and then as instant-ly reverse with the same promptitude of action on a differentapplication. A doubt having been expressed as to whether,by the same machinery, she could be held on the samesteady course for a length of time, the steersman fixed on amill chimney two miles distant, and made for it. After get-ting her from the previous violent swayings into true line, hechopped the bar and let her run for it, until all on board
Scientific American Volume 21 Number 20 (November 1869) . en by thethumb and finger, but which made the North Star, a long, nar-row river boat, almost tarn on her centre, and then as instant-ly reverse with the same promptitude of action on a differentapplication. A doubt having been expressed as to whether,by the same machinery, she could be held on the samesteady course for a length of time, the steersman fixed on amill chimney two miles distant, and made for it. After get-ting her from the previous violent swayings into true line, hechopped the bar and let her run for it, until all on board weresatisfied of the truth of her course. Where the steam rudderis left there it stays, and no power less than that able to over-come all the steam force of the boilers can shift it till againmanipulated by the lever. Numerous experiments were made in turning, backing,twisting, and all with astonishing results. When standingstill the rudder could be put down with such force as to swingthe vessel a point or two. I really believe that, had such an Fw. JEAN ELIE RICHARDS PHOTOGRAPHIC PRINTING cut on the inner side of the lower part of J. When T isslid up near to the pivot, I, upon which the rock-bar, H, plays,very little motion is imparted to J and through it and the bar,L, to the lower part of the screen, while the motion of thetop remains the same as before. When T is made to approachthe pivot, K, on which tlie rock-bar, J, plays, the motion im-parted by H to J is greatly increased, so that the bottom ofthe screen, N, is moved considerably more than the top. By these ingenious means all the movements required tobe made in the printing of a vignette are automatically per-formed, and with much greater uniformity and accuracy thanis possible when they are, done by hand. It exhibits greatfertility of resource in invention, and its merit eminentlyconsists in the simplicity of the means employed to securethe complicated movements required, Patented through the Scientific American
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectiron, booksubjectsoci
