The Slide Rule As An Aid In Calculation, With A Short Description Of Some Other Labour-saving Methods Employed By The Modern Calculator. With Numerous Examples Worked Out by Robert Gordon Blaine
1946. Sixth Edition New Impression. 152 pages. No dust jacket. Brown cloth boards with lettering. Clean pages with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pencil markings to front free endpaper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Lettering is bright and clear. Visible wear marks to boards.