Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 114
the legs to spread gently until thenut prevents further movement. This operation requires muchcaution to prevent the legs from slipping from the grasp of the lefthand and violently springing against the nut, an accident severalof which might spoil the threaded members of the tool and renderit unfit… … Adjustingscrew ^Needle point LeadFig. 51.
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
