Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 136
horizontal line midway between the upper and lower sides of such area. The depth of this lineproceeding from the surface of the liquid downward, varies as the odd numbers 1, 8, 5, 7, etc., as willbe seen by an inspection of the adjoining diagram, Fig. 2343. The figures placed upon the dottedlines…
Mechanical engineering -- Dictionaries
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