Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 22
g and moving about with the wind, thus traces an ir-regular line on the cylinder. If the fly revolves in the simple proportion of the velocity of the wind,the length of line marked by the pencil is proportional to the space which would be described by a par-ticle of air in a given direction in a… … 2ft ANEROID BAROMETER. tered on a paper placed on a board moved by means of clock mechanism. The pressure is measuredby a plate always directed so as to face the wind. Three pencils are used, of which one registers thepressure of the wind in pounds per square foot, another the direction of the…
Mechanical engineering · Mechanics · Engineering
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