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JOHN HENRY DALLMEYER (183o-1883)

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Originally appearing in Volume V07, Page 772 of the 1911 Encyclopedia Britannica.
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JOHN See also:HENRY See also:DALLMEYER (183o-1883)  , Anglo-See also:German optician, was See also:born on the 6th of See also:September 1830 at Loxten, See also:Westphalia, the son of a landowner . On leaving school at the See also:age of sixteen he was apprenticed to an See also:Osnabruck optician, and in 1851 he came to See also:London, where he obtained See also:work with an optician, W . See also:Hewitt, who shortly afterwards, with his workmen, entered the employment of See also:Andrew See also:Ross, a See also:lens and See also:telescope manufacturer . See also:Dallmeyer's position in this workshop appears to have been an unpleasant one, and led him to take, for a See also:time, employment as See also:French and German corrrespondent for a commercial See also:firm . After a See also:year he was, however, re-engaged by Ross as scientific adviser, and was entrusted with the testing and See also:finishing of the highest class of See also:optical apparatus . This See also:appointment led to his See also:marriage with Ross's second daughter, Hannah, and to the See also:inheritance, at Ross's See also:death (1859), of a third of his employer's large See also:fortune and the telescope manufacturing portion of the business . Turning from astronomical work to the making of photographic lenses (see See also:PHOTOGRAPHY), he introduced improvements in both portrait and landscape lenses, in See also:object-glasses for the See also:microscope and in condensers for the optical See also:lantern . In connexion with See also:celestial photography he constructed photo-heliographs for the Wilna See also:observatory in 1863, for the Harvard See also:College observatory in 1864, and, in 1873, several for the See also:British See also:government . Dall'See also:meyer's See also:instruments achieved a wide success in See also:Europe and See also:America, taking the highest awards at various See also:international exhibitions . The See also:Russian government gave him the See also:order of St See also:Stanislaus, and the French government made him See also:chevalier of the See also:Legion of See also:Honour . He was for many years upon the See also:councils of both the Royal Astronomical and Royal Photographic See also:societies . About 188o he was advised to give up the See also:personal supervision of his workshops, and to travel for his See also:health, but he died on See also:board See also:ship, off the See also:coast of New See also:Zealand, on the 3oth of See also:December 1883 .

His second son, See also:

THOMAS RUDOLPHUS DALLMEYER (1859-1906), who assumed See also:control of the business on the failure of his See also:father's health, was principally known as the first to introduce telephotographic lenses into See also:ordinary practice (patented 1891), and he was the author of a See also:standard See also:book on the subject (Telephotography, 1899) . He served as See also:president of the Royal Photographic Society in 1900-1903 . DALL' ONGARO, See also:FRANCESCO (1808-1873), See also:Italian writer, born in See also:Friuli, was educated for the priesthood, but abandoned his orders, and taking to See also:political journalism founded the Favilla at See also:Trieste in the Liberal See also:interest . In 1848 he enlisted under See also:Garibaldi, and next year was a member of the See also:assembly which proclaimed the See also:republic in See also:Rome, being given by Mazzini the direction of the See also:Monitor oiciale . On the downfall of the republic he fled to See also:Switzerland, then to See also:Belgium and later to See also:France, taking a prominent See also:part in revolutionary journalism; it was not till 186o that he returned to See also:Italy, where he was appointed See also:professor of dramatic literature at See also:Florence . Subsequently he was transferred to See also:Naples, where he died on the loth of See also:January 1873 . His patriotic poems, Stornelli, composed in See also:early See also:life, had a See also:great popular success; and he produced a number of plays, notably Fornaretto, Bianca Capello, Fasma and Il Tesoro . His collected Fantasie drammatiche e liriche were published in his lifetime .

End of Article: JOHN HENRY DALLMEYER (183o-1883)
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