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SCIENTIFIC INSTRUMENTS / MODERN GEOMAGNETISM: رهنماى سفاين [Guide of Vessels / Rehnümayı Sefain or Rehnümâ-yi Sefâin]


The first Ottoman book on the modern geomagnetism and binnacle, including an almost always missing rotating volvelle


Small 4°: 332 pp. with an illustrated title page, charts and one illustrations, 3 double-page illustrations including a colour lithograph, folding chart, a page with mounted volvelle, composed of two parts and a string and instructions on the last page, original errata printed on a smaller brown sheet, detached from the title page, contemporary debossed dark green cloth binding, brown calf spine, original yellow endpapers.

(Minor age-toning and foxing, tiny partly repaired tears in margins and folds, tiny cracks in the spine, old repaired tiny losses of paper in endpapers, splits at the gutter in the front endpapers and in the last part of the book without loose sheets, overall in a good condition).

1 in stock


A rare book in Ottoman language on the modern geomagnetism and the use of binnacle was published in 1883 in Istanbul. The books includes instructions, calculations and charts. A volvelle, composed of two parts, with attached instructions, which is usually missing, was meant to be cut out and applied to an instrument.

The author, the military commander Mehmed Bey from Aksaray, is not to be confused with the 16th century naval commander Aksaraylı Piri Mehmed Paşa (also wrongly attributed by Özege).

We could only find one institutional example (NYU Libraries, Elmer Holmes Bobst Library). The other examples, listed on Worldcat appear to be eBooks or microfilms.

References: OCLC 949519358 & 903812399; Özege 16704.

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