Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 486
anes, perpendicular tothe axis ; as between two circles of latitude. A lime is the surface in-cluded between two planes meeting along the axis ; as between twosemicircles of longitude. (a) Divide the arc ric into three (or other number) ofequal parts. Draw da, bb. Join bd, bd and produce tomeet in… … ~or^ >^ H N\ \M \ I4 6t X The other zones must be similarly developed,(b) Make // = ab. Join ot, ot. Then tot is the plan ofa lune of TV the surface. Set off oNx — arc ric (Prob. 113). Divide 0 Nx into three equal parts by RXRV SXSV making RXRX — rr, SXSX =ss. Draw the curves tSv RXNX as shown.…
