World Library  
Flag as Inappropriate
Email this Article

John Henry Dallmeyer

Article Id: WHEBN0002611803
Reproduction Date:

Title: John Henry Dallmeyer  
Author: World Heritage Encyclopedia
Language: English
Subject: Ross (optics), Thomas Rudolphus Dallmeyer, Dallmeyer, 1911 Encyclopaedia Britannica articles with no significant updates, F-number
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

John Henry Dallmeyer

John Henry Dallmeyer
John Henry Dallmeyer
Born 6 September 1830
Loxten, Westphalia
Died 30 December 1883 (aged 53)
Occupation optician
Children Thomas Rudolphus Dallmeyer
John Henry Dallmeyer (6 September 1830 – 30 December 1883), Anglo-German optician, was born at Loxten, Westphalia, the son of a landowner.

On leaving school at the age of sixteen he was apprenticed to an Osnabrück optician, and in 1851 he came to London, where he obtained work with an optician, W Hewitt, who shortly afterwards, with his workmen, entered the employment of Andrew Ross, a lens and telescope manufacturer.

Dallmeyer's position in this workshop appears to have been an unpleasant one, and led him to take, for a time, employment as French and German correspondent for a commercial firm. After a year he was, however, re-engaged by Ross as scientific adviser, and was entrusted with the testing and finishing of the highest class of optical apparatus. This appointment led to his marriage with Ross's second daughter, Hannah, and to the inheritance, at Ross's death (1859), of a third of his employer's large fortune and the telescope manufacturing portion of the business.

Turning from astronomical work to the design and making of photographic lenses, he introduced improvements in both portrait and landscape lenses, in object-glasses for the microscope and in condensers for the optical lantern. An important invention was the Rapid Rectilinear camera objective. In connexion with celestial photography he constructed photo-heliographs for the Wilna observatory in 1863, for the Harvard College Observatory in 1864, and, in 1873, several for the British government.

Dallmeyer's instruments achieved a wide success in Europe and America, taking the highest awards at various international exhibitions. The Russian government gave him the order of St Stanislaus, and the French government made him chevalier of the Legion of Honour.

He was for many years upon the councils of both the Royal Astronomical Society and Royal Photographic Society. About 1880 he was advised to give up the personal supervision of his workshops, and to travel for his health, but he died on board ship, off the coast of New Zealand, on 30 December 1883.

His second son, Thomas Rudolphus Dallmeyer assumed control of the business on the failure of his father's health.

References

Attribution

Public Domain This article incorporates text from a publication now in the public domain

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.