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[SCIENTIFIC INSTRUMENTS -- OPTICS]. WRIGHT, LewisBiblio.com

Optical projection: a treatise on the use of the lantern in exhibition and scientific demonstration. . . .

[SCIENTIFIC INSTRUMENTS -- MINING]. AINSWORTH, WilliamBiblio.com

Illustrating and describing the superior line of assay and analytical balances. Catalogue A. Manufactured by. . . .

189852564Denver CO: Wm. Ainsworth 2151 Lawrence St. 1898. Oblong 8vo. 24 pp. Text illustrations & diagrams throughout. Pink-coloured printed softcovers cover art of assayers scale on front and back covers minor shelfwear minor tidemark to upper fore-edges slight sunning still VG- copy w/ original printed mailing envelope addressed to Joe Seliger 1868-1947 former stenographer secretary and metalworker for Honeyman Hardware Co. Portland OR. First edition of this very rare catalogue detailing the precision balances for mineral assayers manufacturers chemists jewelers and pulp paper makers. Ainsworth 1850-1917 began as a fine watchmaker steam engineer toolmaker and distiller who moved to Denver in 1877 where he initially began working for A.B. Ingols Jewelry. By the 1880s he was operating a jewelry store repairing balance scales for miners and assayers because at the time these were produced in England and required months of turnaround time for them to be shipped back and repaired prior to Ainsworth. Ainsworth developed his own excellent balance as presented in this catalogue which featured a shortened balance beam speeding up the assaying process and were much preferred by Western assay offices and miners. He continued to operate as a watchmaker and clock repairer but by 1895 began producing Brunton’s newly patented Pocket Transit which together with the balances proved to be a very successful combination with his first Catalogues A & B depicting both products issued in 1898. The company would continue to grow after his death and would be purchased by Xavier Science Corporation and now owned by the Denver Instrument Company. No copies located in Worldcat; See: John Shannon & Geraldine Shannon The Assay Balance: Its Evolution and the History of the Companies That Made Them -- William Ainsworth Robert A. Paselk Scientific Instrument Museum Humboldt State Univ. Dept. of Chemistry 1999. Wm. Ainsworth, 2151 Lawrence St., paperback

Zephyr Used & Rare Books · États-Unis275,00 $US≈ 232,68 €

Instruments cp

Optical projection: a treatise on the use of the lantern in exhibition and scientific demonstration. . . .

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Optical projection: a treatise on the use of the lantern in exhibition and scientific demonstration. . . .

Manuel d'électrothérapie Gynécologique : Technique Opératoire

Complete Japanese Sewing Manual <Japanese Version>

A treatise on mathematical instruments including most of the instruments employed in drawing for assisting the vision in surveying and levelling in practical astronomy and for measuring. . . .

THE M. STEINERT COLLECTION OF KEYED & STRINGED INSTRUMENTS Various Treatises on the History of These Instruments. the Method of Playing Them & Their Influence on Musical Art

Die Theorie und Praxis des Nivellirens mit besonderer Rucksicht auf Libelleninstrumente. . . .

On the Photographic Self-registering Mateorological and Magnetical Instruments. Received November 18 1846 - Read January 21 1847.

Tables for ascertaining the strength of spirits with Sikes Hydrometer; with an abstract of The Act of Parliament. By Authority of Parliament

A manual of the principal instruments used in American engineering and surveying. . . .

Microscopes et Appareils Accessoires. No. 30 At head of title: Carl Zeiss Optische Werkstaette Jena

Priced catalogue of surveying and mathematical instruments and drawing materials for engineers architects surveyors draughtsmen railroad construction. . . .

Illustrating and describing the superior line of assay and analytical balances. Catalogue A. Manufactured by. . . .

A treatise on the principal mathematical instruments employed in surveying levelling and astronomy: explaining their construction adjustments and use. With an appendix and tables. . . Catalogue of instruments made by Troughton and Simms. . . .

Lithograph of a group of 19th century instrumentalists by H.J. Backer after a drawing by David Joseph Blès 1821-1899

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