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

by Slide Rule, Charles N. Pickworth

$195 · Offered by Tavistock Books

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

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