ice by Mr. Fur- the softer white pine, the wear being respectively 13 and dotted lines, as shown in Fig. 1, indicating the move- 7s of aninch. Yellow pine showed the same wear as ness, and it certainly forms a very valuable and relia- ment of the saddle and brake shoe as the brake is ap- ble… … left hand corner of each specimen drawn on a half size scale. The diagonal shading shows the portion of the materials which remained intact, and the clear space ing devices partly in section. The improvement has beneath shows the amount that was worn away by the been patented by Heinrich G.…
Internet Archive · Public domain (published before 1931). Free to use for anything.
