Instructions For The Use Of A W Faber's Improved Calculating Rule

No Date But Cir Early 1900'S. 49 Pages With 13 Fold Out Sheets In Rear. Heavy Beige Paper Stock. Pages Show Extensive Wear, Yellowing; Fading; Rubbing. Some Smudges, Soiling; Previous Owner Name And Few Marks On End Pages. Front And Bacj Inner Spine Crease Weakened And Split; Faded Gray Soft Covers With Black Lettering And Border On Front Cover. Cover Is Fragile Condition With Several Tears And Corners Torn From Cover. Soiling And Darkened Areas On Both Front And Back Covers. Outer Spine Area Shows Exposed Inner Page Binding; Several Pages Corners Bumped And Creased. Fold Out Sheets Are In Moderate Condition. Contents Titles Include: Construction Of The Calculating Rule; The Scales; Proportion; Multiplication; Division The Inverted Slide; Squares And Square Roots; Practical Illustrations Of The Use Of The Calculating Rule; (Mensuration, Screw Cutting; Gearing; Delivery From Pups; Power Of Steam Engines); The Trigonometrical Application Of The Calculating Rule (The Scale Of Sines; Scale Of Tangents; Scale Of Logarithms); New Form Of A W Faber's Calculating Rule; (Rule With New Digit Registering Cursor; Number Of Digits In A Product; Quotient; Combined Multiplication And Division; Circumference And Area Of Cylinders; Sines And Tangents, Etc.) Very Rare Vintage Copy; In Fragile Condition But Readable.…