Text-book of theoretical naval architecture (1889)
Attwood, Edward L. (Edward Lewis), 1871- · London, New York [etc.] Longmans, Green, and Co. · leaf 17
culars are taken together the less will bethe error involved by using this rule. Putting this rule intowords, we have— To find the area of a curvilinear figure, as ABCD, Fig. 7,by means of the trapezoidal rule, divide the base into any con-venient number of equal parts, and erect perpendiculars to… … The perpendiculars to the base AB, as AD, EF, are termed ordinates and any measurement along the base from a givenstarting-point is termed an ^abscissa. Thus the point P onthe curve has an ordinate OP and an abscissa AO whenreferred to the point A as origin. Simpsons First Rule.^—This rule assumes…
Naval architecture
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