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Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments, elementary instruction in practical mechanical drawing together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1883)

Rose, Joshua · Philadelphia, H.C. Baird & Co.; London, S. Low, Marston, Searle & Rivington · leaf 63

An illustration from Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments, elementary instruction in practical mechanical drawing together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers, 1883, leaf 63
L DRAWING SELF-TAUGHT. the second an Inscribed polygon. A regular poly-gon is on^ the sides of which are all of an equal length. NAMES OF REGULAR POLYGONS. A figure of 3 sides is called a Trigon. polygon 4 a Tetragon. 5 (( Pentagon. 6 a Hexagon. 7 (( Heptagon. 8 (( Octagon. 9 a Enneagon or Nonagon…

Mechanical drawing

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