The Slide Rule. A Practical Manual by Charles N. Pickworth
1950. 24th Edition. 126 pages. No dust jacket. Brown cloth with black lettering. Some dark smudging to pages 94-95. Minimal foxing and tanning to endpapers and page edges. Mild wear and bumping to spine, board edges and corners, with tanning to spine. Notable scuffing, staining and marking to boards.