Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...at Hamilton (Canada), but without dynamometer, and still another, similar to the latter, was used by Mr. A. H. Van Cleve in making a series of experiments for the Camden & Amboy Railroad some years earlier. A modification of the McNaught machine which renders it far more useful than the original has been made by Mr. Hodgson, A siJe elevation of this machine, representing some of the parts in sections, is shown by fig. 16, a front elevation by fig. 17, and a plan by fig. 18. It consists of a horizontal plate A A, figs. 16 and 17, attached to a vertical shaft, B B, which is driven by a pair of mitre wheels, C and D, the latter attached to the horizontal shaft, D E, on which are.a tight and a loose pulley, F and G, which are driven by a belt. The plate A A has an angular groove or receptacle in top, in which a corresponding plate, H H, bears. This plate is attached to the shaft 11 so that they will turn together, but the shaft is fitted into the plate somewhat loosely, so that the plate HH can always bear on A A uniformly all round, and not be constrained by the shaft I, The oil to be tested is placed in the annular groove between the two plates, or in an oil-cup, a, attached to the top plate. On top of the shaft/a lever, J J', bears on the centre, J. Any desired pressure can be brought to bear upon the lever and shaft, and through the latter upon the plate H H, by means of a spring balance, K, which can be screwed down to any desired pressure by a thumb-screw, b. It is obvious that if a pressure is brought to bear on the two plates, as the lower one revolves, the friction between them will tend to turn the upper plate and the shaft / to which it is attached. This motion will be resisted by a lever, L L', (shown in plan below, fig. 17)...
