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Scientific American, Vol. 21, No. 20 (1869) (1869)

leaf 7

An illustration from Scientific American, Vol. 21, No. 20 (1869), 1869, leaf 7
lide, T, writes to the St. Louis Dispatch as follows: of the picture, until it finally fades out altogether, a device which is adjustable upon the rock-bar, J, being held at any The experiment was such a complete and marked success: usually consisting of cloth or paper painted black on the point… … which is opened when in use, an opening in the opposite side of the case being provided with a telescopic tube and a slide. apparatus been on the Milwaukee and Lac La Belle, when cut on the inner side of the lower part of J. When T is The door is shown thrown open in the figure. they met on the St.…

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