Scientific American. | NOVEMBER 20, 1875. this another lid is placed and covered with ice, which the outer ting thread should be ground, and at (' the correctness of the vessel, B, also contains. Finally, a double lid covers the angle of a screw thread already cut. In the lower figure the whole.… … Broom-Sewing Machine. dex on theleg showing the amount of variation from the true | to the inch, are useful in measuring the number of threads size to which the joints have been set; ¢ is a spring calipers; !tothe inch of taps and screws. Fig. 5 is a Dictionary,”* we give below a variety of…
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