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повнийінформаційнийкороткий
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   D 43


    Dent, Edward John (1790-1853).
    A treatise on the aneroid, a newly invented portable barometer [Текст] : with a short historical notice on barometers in general, their construction and use / E. J. Dent. - London : Published by the author, 1849. - 34, [2] p. : ill. ; 8° (21 cm). - Текст на англ. яз. - Б. ц.
Примеч.: в конце изд. пром. реклама барометров.
Примітки про походження:
коллекция Б. С. Якоби.
Є автограф: Дент, Эдвард Джон
Екслібрис:
Прим.481и: Якоби Б. [Борис Семенович Якоби, акад. (1801-1874)]. - Штамп. - Фиол. - Овал.
Помітки автора: дарств. запись.
Збереження документу: повреждены блок, корешок.
УДК

Рубрики: технические науки

Кл.слова (ненормовані):
измерительная техника -- барометры -- устройство -- эксплуатация
Анотація: A paper by the London chronometer maker Edward John Dent, who by 1850 would have been awarded no fewer than five patents* for chronometers, clocks and other time-keepers, and ships' compasses. In about 1843, the year of his marriage, "Dent became involved in the manufacture of the dipleidoscope and two other instruments, the aneroid barometer and the marine compass, whose mechanisms bore similarities to those of watchwork. The dipleidoscope, the idea of his watchmaker friend P. M. Bloxham and patented in 1843, was based on the principle of double reflection. It consisted basically of a prism, though larger models had a small telescope and compass, and it enabled the meridian passage of the sun to be timed with great accuracy. Thus it could be used to set a watch, or if the time were known, to calculate the longitude. The aneroid barometer was invented in France by Lucien Vidie, but was dismissed by French scientists as unworkable. Vidie went to London, where an example was constructed and tested, and patented in 1844. Vidie called on Dent as a possible maker, but found Dent unwell and in pessimistic mood. He did, however, allow Vidie to hang three aneroids in his shop window where they were seen and bought by a naval officer who tested them and returned to order thirty more. From this first sale, the aneroid gained in popularity, helped by its small size, portability, and cheapness (Dent sold 6 in. diameter aneroids for 3 guineas). It is unclear whether those bearing Dent's name had mechanisms made in Vidie's workshop in Paris or were built entirely in London." [G.C. Boase rev. Anita McConnell in ODNB]. The present copy is fortunate to have retained Dent's leaf of advertisements in which his barometer is offered for sale at 3 guineas, the pamphlet itself being included in the price. The patent Dipleidoscope was 2 guineas. * Patent numbers 7067, 8625, 9302, 10,277 and 13,176". John Drury Rare Books.
Дод.точки доступу:
Дент, Эдвард Джон

Примірників усього: 1
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Вільні: ред. кн. (1)

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