Metal-work; a handbook for teachers and students (1914)
Adam, Hugh M. [from old catalog], Evans, James Humphrey, [from old catalog] joint author · New York, Longmans, Green and co.; London, E. Arnold · leaf 177
Fig. 142. The countersinking drill (Fig. 142) is used forcountersinkingthe mouths of holes to take screws or rivets, and for removingthe burr from drilled or punched holes. … Rose Bit Drill.Fig. 143.
Metal-work
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
