Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 149
sectional circle. X_ 139 When the cutting plane goes through thecentre of the sphere, it will pass through thegreat circle, and is then called the Equa-tor for the poles. Axis == N.S- Equator —G.E.T.W. Three great circle-planes, aaafa, bbb,and ceV, cutting a sphere, JVESW, will forma solid angle at… … /hilrlll 2}/hie for so/rin(j
Mechanical engineering · Engineering
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