The Gardeners' Chronicle and Agricultural Gazette . COTTAmS By Mr. Clyburns Dynamometer however, theseoscillations, instead of being left to the infinitesimalchance of a fair collation and correct reduction toaverage in the mind of the observer, are registeredon paper with beautiful and minute accuracy at eachmoment of their occurrence. The woodcut belowgives the general form of this instrument:— * The Journal of tLe English Agricultural Society, p. 219, vol. Clyburns The following woodcut, reduced from the figuredrawn by this dynamometer when attached to aplo
The Gardeners' Chronicle and Agricultural Gazette . COTTAmS By Mr. Clyburns Dynamometer however, theseoscillations, instead of being left to the infinitesimalchance of a fair collation and correct reduction toaverage in the mind of the observer, are registeredon paper with beautiful and minute accuracy at eachmoment of their occurrence. The woodcut belowgives the general form of this instrument:— * The Journal of tLe English Agricultural Society, p. 219, vol. Clyburns The following woodcut, reduced from the figuredrawn by this dynamometer when attached to aplough at work, is a better illustration than manywords, of the frequency and extent of these oscilla-tions in its draught. ^Ve can estimate wiih tolerable precision here, where-abouts between parallels 4 and 5—the one represent-ing a draught of 4 cwt. and the other one of 5 cwt.—a line should be drawn—a medium between the measured at intervals to get the ploughman accus-tomed to the right depth and width; the dyna-mometer was then attached a few yards belowthe lower of the above-mentioned lines, and thewheels communicating motion to the paper onwhich the pencil of the instrument records thedraught being dropped when over that line, andlifted again when the plough reached the upper one,a correct figure of the tractive effort of the horsesduring the passage of the plough through 50 yards ofthe land was thus obtained. Halves of these figureshave been taken, and these
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Keywords: ., bookcentury1800, bookdecade1840, bookidg, booksubjecthorticulture
