The essentials of descriptive geometry . Fig. 85. CYLINDRICAL SURFACES 109. Fig. 86. rio ESSENTIALS OF DESCRIPTIVE GEOMETRY or else requires more painstaking work to avoid this tangle thanthe method suggested. This condition is true of all problemsof this character. 94. Proposition 24. Given any cylinder to find its rightsection. Discussion. Pass a plane through the cylinder perpendicularto its axis and find the curve of intersection; this will be a rightsection of the cyUnder. Construction. If both the true size and the projections ofthe right section are required the problem may be best solv

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The essentials of descriptive geometry . Fig. 85. CYLINDRICAL SURFACES 109. Fig. 86. rio ESSENTIALS OF DESCRIPTIVE GEOMETRY or else requires more painstaking work to avoid this tangle thanthe method suggested. This condition is true of all problemsof this character. 94. Proposition 24. Given any cylinder to find its rightsection. Discussion. Pass a plane through the cylinder perpendicularto its axis and find the curve of intersection; this will be a rightsection of the cyUnder. Construction. If both the true size and the projections ofthe right section are required the problem may be best solvedby Proposition 23. If, however, only the true size of the rightsection is required the solution in Fig. 86 will be found moresimple. Let OQ be the axis of the given cyhnder and T theperpendicular plane containing the right section. The axis OQpierces the plane T (Article 56) at P; this will be the center of theright section. Now draw a fine AB through P parallel to the Htrace of T; this hne will be the longest fine which can be drawnbetween two elements of the surface;

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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192400462, bookyear1915