Lot 195 (Maritime and Scientific Models, Instruments & Art ('Fearless'), 7th November 2017)
Sold for £38,000
A RARE, POSSIBLY UNIQUE, W. MARSHAM ADAM'S COELOMETER, CIRCA 1874
constructed in lacquered and oxidised brass and comprising a 6in. terrestrial globe published by J. Wyld mounted on rotating axis with elliptical true horizon indicator ring, equinox ring and detachable hinged star cage set with gilt star constellations stamped with names as appropriate, the whole mounted on a single swiveling bracket with threaded securing nuts on turned wooden base with inset maker's label inscribed ADAMS'S CŒLOMETER, set in later ebonised wooden display base with glass dome (dome cracked and missing section). The Coelometer -- 20 x 18in. (51 x 45.5cm.)
Literature: Nautical Magazine, November 1874, p.1025-1026.
This instrument was designed to instruct and test naval cadets in their navigational proficiency. According to the above-mentioned article W[alter] Marsham Adams (1838-1899) was a former Fellow of New College, Oxford and seems to have been an author on various subjects, and an inventor having sent no less than three to the Vienna World's Fair Exhibition of 1873 of which this was awarded a medal: the Coelometer exhibits in a concrete form all the conceptions which are necessary for nautical astronomy and the relations which exist between them.. In prosecution of this object, it occurred to him to devise an instrument which should illustrate physically the conceptions of celestial latitude and longitude, as well as right ascension and declination. The method of representing the true horizon soon afterwards suggested itself, and subsequently the corrections for dip, parallax and refraction were added. By these means the whole theory of nautical astronomy becomes evident at a glance. The article later mentions that both the Training Ship Conway and the President of the Naval College at Greenwich planned to place orders for examples and that soon every training college, examining department and every ship and school would acquire one - to date this lot is the only example sighted in any public or private collection and it seems likely that the expense of such an instrument compared to traditional techniques thwarted the author's confident prediction.
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Key to condition codes:
B Minor wear
C Old/typical wear commensurate with age
F Very poor overall condition
1 No visible issues
2 One or two minor nibbles
Auction: Maritime and Scientific Models, Instruments & Art ('Fearless'), 7th November 2017
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