. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 18-R).] THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 120 iipcted to tlie body of the caniage by means of springs, and kept in their places by guide plates, so that it is only necessary for the tondoncc to move in a curve to exert a force sufficient to alter the position of each journal, â ^'^y-i^:^-^ of an inch, in oriler to pass round a curve a mile radius solely by the influence of the cone, a quantity so small that the Doctor will find great difficulty in |)ersuading practic
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 18-R).] THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 120 iipcted to tlie body of the caniage by means of springs, and kept in their places by guide plates, so that it is only necessary for the tondoncc to move in a curve to exert a force sufficient to alter the position of each journal, â ^'^y-i^:^-^ of an inch, in oriler to pass round a curve a mile radius solely by the influence of the cone, a quantity so small that the Doctor will find great difficulty in |)ersuading practical men that it is "impoi- stblt" such a deviation can take place, more especially as we see a force equal to TOUlbs e, to produce it. In'^uiker. VERTICAL WATER-WHEEL. Fig. 1.â The accompanying engravings represent a vertical water-wheel, upon the principle of Barker's mill, which I erected at the iron- works of the United Mexican Mining Association at Durango, in Mexico, in 1832, for the purpose of driving a circular saw ; it was desirable to produce a rapid movement witliout the intervention of gearing, and this not being possible by means of the breast wheel, which was, besides, fully loaded with the blast machinery, it occurred to me to avail myself of Barker's mill; I first formed a rough working model, upon the usual construction, but found the action of it so very feeble, that I surrounded the arms with boards, in order that the flowing water might impinge against them; this arrangement quad- rupled the velocity of (he machine: I then added the upper part, which was a still further improvement. The height of fall was about S feet, the bore of the pipe about 12 inches, the length of the legs about 30 inches from the centre, tlie size of the orifices about 0x2=: 12 square inches, the velocity 4U revolutions a minute ; by the period it was completed and set to work, the works were suspended, so that nothing further was done with it; I had a
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Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
