Item #19980 INSTRUCTIONS For The USE Of A. W. FABER'S IMPROVED CALCULATING RULE. Slide Rule, Charles N. Pickworth.

INSTRUCTIONS For The USE Of A. W. FABER'S IMPROVED CALCULATING RULE.

New York: A. W. Faber, (n. d.). Ca early 1900s. 47 pp of explanatory text. 55 diagrams, on 14 fold-out sheets at rear, illustrating slide-rule usage. 8vo. 24 cm x 16.5 cm. Red cloth spine with stiff grey paper-stock covers. VG (some minor soiling & thumbing to covers). Item #19980

Price: $195.00

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