Appletons' cyclopædia of technical drawing : embracing the principles of construction as applied to practical design ... (1896)
Worthen, W. E. (William Ezra), 1819-1897 · New York : D. Appleton · leaf 22
and that the arcs can therefore betaken as the measures of angles. For thispurpose the whole circumference is supposedto be divided into three hundred and sixty de-grees (360°), each degree subdivided into sixty minutes (60), and each minuteinto sixty seconds (60). Each right angle has for its… … A FIG. 10. \\i kFIG. 11. as the base of the required angle. From A, with any suitable radius, describethe arc B C, and from a, with the same radius, describe the arc b c. Withthe compasses take the length of the chord B C, and, from b as centre, describean arc cutting the arc b c at c, and draw the…
Mechanical drawing
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