Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 873
me of water furnished; and it is often of importance, as when considerable accuracy is desired, toresort to more than one mode of measurement. In all ordinary experiments of this kind, there is acertain degree of uncertainty arising from inaccuracy of measurement; it is therefore of importance… … accuracy, will therefore be useful. This consists in erecting a notch in some convenient part of thewatercourse where the velocity is not great. The notch is easily formed in leads of moderate size byaboard A A, Fig. 3806, stretched across the channel, and having a rectangular part AcdA cut…
Mechanical engineering
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