Perspective and geometrical drawing adapted to the use of candidates for second and third-class teachers' certificates . THE CUBE. 67 Example 1,—Draw a cube, edge 4, placed on , one sideparallel to and 2 within it, near angle 3 to right. H = 6; = i\ scale ^ = V, Draw , , and O, and find IMP as A 3^ to right, and B 4 to right of A; take 0 2 to leftof A, and D M to left of 0; join A , D MP andC MP, cutting A in F and E. On AB describe squareASMB; join S , M and B ; through E and Fdraw parallels to AS, meeting S in H and G; through
Perspective and geometrical drawing adapted to the use of candidates for second and third-class teachers' certificates . THE CUBE. 67 Example 1,—Draw a cube, edge 4, placed on , one sideparallel to and 2 within it, near angle 3 to right. H = 6; = i\ scale ^ = V, Draw , , and O, and find IMP as A 3^ to right, and B 4 to right of A; take 0 2 to leftof A, and D M to left of 0; join A , D MP andC MP, cutting A in F and E. On AB describe squareASMB; join S , M and B ; through E and Fdraw parallels to AS, meeting S in H and G; throughG, H draw parallels to SM, meeting M in K and LN from L J_ to MB, and EN from E parallel to will complete the required cube. For XA = 3, andAE = AC = 2, AF = AD and EF = CD = AB = 4; also FG==EH = AS = 4, and GK = HL = EN = AB = 4: thenEF = GH= KL=4, etc. (Fig. 38.) 68 DRAWING. The The plinth differs froma cube only in the rela-tion of its dimensions;the principle employedin drawing them is thesame, but a particularside of the plinth is men-tioned in reference tothe or In thecube this is quite un-necessary, as all the sidesare Example 1,—Draw plinth whose dimensions^ are 4 x 3^ x 2 (4 long,W wide and 2 thick),the side 4 x 3 rests onthe ground plane, andside 3 X 2^ is parallel and 2from it; theplinth is 2 to the = 6^ = 4,scale Draw , andfind ,OandMPasbefore. Take B, 2 toleft, and A, 3 to leftof B; also M, 4 toright of O. On AB THE PLINTH. 69 construct the oblong ABDC, 3^x2; join C , D ,A , B ; also O MP and M MP. Prom points K, H,where B C. V. intersects O MP and M MP, erect KN and HGparallel to BD; and through N, G draw NE and GP paral-lel to CD, Draw EL J_ ^ndPG-EN-LK-AB-3^GH-NK-DB-2,
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Keywords: ., bookcentury1800, booksubjectgeometricald, booksubjectperspective
