shifting the belts and start- ings. adapting the camera to the heliograph, but applications of a ing or stopping. Curved blades can be placed in the verti- An improved lifting-jack, patented by Messrs. Joseph S. like nature are practiced every day by scientific men. The cal slide if desired, and… … Mr. John D. Graves, of ficulty is at once obviated by Fig. l.-PLATE SHEARING MACHINE. bringing into play a second Wichita, Kan., has invented mirror, which reflects the an improved windmill, in rays on to the first. But if the distance to be signaled is lower blade may readily be removed to receive…
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