Parsons, Frank Alvah · New York, Chicago [etc.] Pub. for the Advertising men's league of New York city by the Prang company · leaf 50
up to the picturemoulding. It is inconsistentmovement when it takes a newdirection obliquely from theframe to a picture hook and SdUflf—THE EMCtNEERrNC AND MINING JOURNAU-Sn Dtccinbcf 3, iPlCt Theres BeenA Change in rock-drilling methods with-in the past kw years-^ changefor better results^ lower… … Wonder Rock Drills ,bave these big points to interest themine manager who is looking (or tiie^ost efficient drilL,The Wonder Rock Drill is a one-mandrill using one-third the air required bythe two-man^driUs;fudged by what really counts—t/ic»tiii«-ber of feel o/ holes drilled per cubu: loot, dj air…
Advertising
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
