Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 46
plete the octagon by drawing 3-5, 5-6, and 6-4. Fi-b ±s. To Draw a Right Line Equal to HalfTHE ClRCUxMFERENCE OF A Given CIRCLE.—Draw a diam-eter AB. Draw line AC perpendicular to AB and equal tothree times the radius of the circle. Draw another perpen-dicular at B to AB. With center B and radius… … Figb 49. To Find A Mean Proportional to twoGiven Right Lines.—Extend the line AB to E making BEequal to CD. Bisect AE in F. From F with radius FA de-scribe a semicircle. At B where the two given lines arejoined erect a perpendicular to AE cutting the semicircle inG. BG will be a mean proportional…
