Shaw's Civil architecture; being a complete theoretical and practical system of building, containing the fundamental principles of the art . STAIRS. 125 height insisting upon e, and c k equal to the heightinsisting upon c; join Ik,and produce it to i. Then,because of the similar triangles e i I and c i k, i e :i c : : e I: ck; that is, i c is the same part of i e thatc A; is of e I; therefore, if e / be double of c k, e i willbe double of c i, or i c will be equal to c e. If the workman should not understand the demon-stration now given, he may proceed mechanicallythus, the seats of the restin
Shaw's Civil architecture; being a complete theoretical and practical system of building, containing the fundamental principles of the art . STAIRS. 125 height insisting upon e, and c k equal to the heightinsisting upon c; join Ik,and produce it to i. Then,because of the similar triangles e i I and c i k, i e :i c : : e I: ck; that is, i c is the same part of i e thatc A; is of e I; therefore, if e / be double of c k, e i willbe double of c i, or i c will be equal to c e. If the workman should not understand the demon-stration now given, he may proceed mechanicallythus, the seats of the resting points being a, c, e. Join e c, and produce ecioi; draw e I and c k per-pendicular to i e; make e I equal to the height upone, c k equal the height upon c; join I k and produceit to /, and join i a; then i a is the intersecting i a both ways to ti and v, cf to o and i, andd e to o and m; di-aw d r, e m, and o q perpendicularto du; draw o p, fia, and c n perpendicular to o v;make c n equal to c k, and join v n; produce v ntop; mak o q equal to o p, and e m equal to e I; joinm q; then, if m g be produced, it will meet uv
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Keywords: ., bo, bookcentury1800, booksubjectarchitecture, booksubjectbuilding
