Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 50
-c at /. The differencea-f between a-c and f-c will be amount of the fore-shortening, and this will vary, according to the angleat which the side a-c may be placed. From this it isseen that objects to be represented true to size by pro-jection must be represented by views so placed thatwhen… … 45 46 A MANUAL OF MECHANICAL DRAWING. tomed f wide, round at one end and square at theother end; a line passing through the centre of thisdepression is ■^ off the centre of the prism. Theround end of the depression is ^ from the end of theprism, while the opposite ends are ■^ apart. Thedepression…
Mechanical drawing
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