 | Alva Walker Stamper - Geometry - 1906 - 188 pages
...time in the forenoon the shadow will be represented by a line such as BC. With C as a center and BC as a radius draw a circle. Let CD be the position of...bisector of BD. This is the required meridian line. 5 Cantor I, p. 513ff; Gunther, Geschichte des mathematischen Unterrichts im deutschen Mittelalter bis... | |
 | David Eugene Smith, Louis Charles Karpinski - Numerals - 1911 - 188 pages
...of VA Iluber, London, 1843, Vol. I, p. 61; WWR Ball, History of Mathematics at Cambridge, 1889; S. Giinther, Geschichte des mathematischen Unterrichts im deutschen Mittelalter bis zum Jahre 1525, Berlin, 1887, being Vol. HI of Monumentq Germaniae paedagogica, account such a book would attract even... | |
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BC ao a radius draw a circle. Let CD be the position of the shadow in the afternoon when its extremity just touches the circumference. BC = CD. Join B, D and draw the perpendicular bisector of BD. This is the required meridian line. 'Cantor I, p. 513ff;... 