A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 23
s. If the pen is held so that only one bladebears on the paper when drawing, the line will almost inva-riably be ragged on the edge where the blade does not bear.When held at right angles to the paper, as in Fig. 16, how-ever, both blades will rest on the paper, and if the pen is ingood condition,… … Fig. 16 In drawing circles with the compass pen. the same careshould be taken to keep the blades perpendicular to thepaper by means of the adjustment at the joint. In boththe ruling pen and compass pen. the width of the lines canbe altered by means of the screw which holds the bladestogether. The…
