. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. SECTION III. MEASUREMENT OF POWER,SPRINGS. 33 Section OF POWER, SPRINGS. 38. REGISTERING WIND VANE. The wind vane, a a, 1^feet above the roof of the building, the vertical shaft, b b, which is fastened to and turns with the vane,and gives corresponding
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. SECTION III. MEASUREMENT OF POWER,SPRINGS. 33 Section OF POWER, SPRINGS. 38. REGISTERING WIND VANE. The wind vane, a a, 1^feet above the roof of the building, the vertical shaft, b b, which is fastened to and turns with the vane,and gives corresponding movementsto the cyhnder, c c, round which theregister paper is fastened. Thepaper is divided vertically into 24parts for the hours of the day andits circumference on the drum into4 divisions, N, E, S, W, for the quar-ters of the wind. At d, is a penciltube attached to the top of theweight, e, and the pencil bearslightly against the paper by an In-dia rubber elastic spring. A clock,g, permits this weight to descend tothe bottom of the cylinder in twenty-four hours, when the cyhnder istaken out, and the register slipped off. Another one is put on bypasting one of the edges of the paper and letting it overlap the otheredge round the
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
