Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 14
hem an exceedingly poor investment for the average mechanic or draughts-man. The best way known to the writer to lay off any required angle to any degree ofaccuracy does not require the use of any other instruments than the ordinary T squareand scale, and a lead-pencil. These instruments, it will… … Fig. 1. First, for the benefit of our readers who have never had an opportunity tobecome familiar with geometry, we will explain what the tangent of an angle is.Draw a circle as shown. Fig. 1, having a radius of one inch. Draw the diame-ter BD, and another diameter AL at right angles or square with…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
