. Appleton's dictionary of machines, mechanics, engine-work, and engineering. k at G and the milled head at P, either of which maybe employed, as found most convenient. The scale S is of boxwood, 1 foot in length, fths of an inchwide, and ^th of an inch thick: it is divided into inches, subdivided into tenths and twentieths of aninch. About 6 inches of the upper part is divided in this way, viz., 3 inches on each side of a centraldivision which is marked zero; the rest of the piece extends to the stage D. The magnetic bar H istied to the scale by compressing screws and simple brass bands, eith
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. k at G and the milled head at P, either of which maybe employed, as found most convenient. The scale S is of boxwood, 1 foot in length, fths of an inchwide, and ^th of an inch thick: it is divided into inches, subdivided into tenths and twentieths of aninch. About 6 inches of the upper part is divided in this way, viz., 3 inches on each side of a centraldivision which is marked zero; the rest of the piece extends to the stage D. The magnetic bar H istied to the scale by compressing screws and simple brass bands, either fixed, as at D and K, or mov-able, as at H. This adjusting apparatus is secured to a stout brass plate R, fitted by a dovetail into asliding piece v, forming part of the mahogany stand E, so that it may be removed at pleasure. Thebrass bands and frames at D H K are sufficiently capacious to inclose two bars together if required, thesuperabundant space being filled when only one magnet is employed, either by a bar of wood or smallwedge pieces in the brass framea. 2701. A.
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
