Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 103
82. To construct a screw IM/r. … 83. To square a Circumference. R - 0-556355 d = 1-1127 r - 0-7071 &S = 0-785398 d = 1-57079 r - 1-4142 22.cZ = 1-27322 S = 1-79740 R = 2 r.
Mechanical engineering · Engineering
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-99-213.webp)
