Veazey, William Reed, 1883- ed, Hodgman, Charles David, 1881- ed, Chemical Rubber Company · Cleveland, Chemical Rubber Pub. Co. [etc.] · leaf 303
(n-ro). … Fig. 2 If Si=the length of the arc GH and §2= the arc JI and h— HI = ri — r2, the area G HIJ = ?/i (Si + S2).The circumference of an ellipse whose semiaxes are a and h = 2^-1 ^—, approximately. The area of an ellipse ^irah. The length of the arc of a parabola, as arc SPQ in Fig. 3,where x = PR, and…
Chemistry · Physics
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