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    Re: Dennert & Pape MHR-1 Dennert & Pape MHR-1 HR-2 Cylindrical Slide LineRuler
    From: Ronald van Riet
    Date: 2007 Aug 01, 01:49 -0700

    I am pretty fluent in French and English, I own an HR-1 and I am
    fairly familiar with its use in navigation, so I could be your
    "translator"/"co-writer". I had already seen a copy of your paper but
    have not had the time to go through it in depth. I would like to work
    with you in getting a paper out, but IMHO this should not only contain
    the mathematical principles behind the HR series and its operation,
    but also how this is put in practice in navigating.
    As far as working on a "final" paper, we might want to await the
    IM2007 in September (www.rekenlinialen.org) where I believe a paper
    will be presented on these types of calculators.
    Ronald van Riet
    On Jul 30, 7:49 pm, Serge SAVOYSKY 
    > July, 30th 2007,
    > Dear Sir,
    > Thank you for your answer.
    > .
    > I am a member of a French association of collectors of calculating machines 
    and other office machines ; we publish twice a year a journal, in French, 
    “Arts Mécaniques”. It is a modest publication, about 200 copies, each issue, 
    nevertheless of good quality ; and these issues are available in the Library 
    of the “Conservatoire des Arts et Métiers”.
    > I began to write my paper at the beginning of 2003 for an issue in 2006. As 
    usual I began to establish a bibliography. I must say that I bought the slide 
    rule, for about €250, almost twenty years before in a market in the 
    south-west of Paris, near my Office “Laboratoire Central des Ponts et 
    Chaussées” and near the “Bassin des carènes” a French Navy Laboratory. I 
    thought immediately that somebody in this laboratory preferred to sell it 
    rather than to put it on the scrap heap. Moreover, some papers in the box of 
    the apparatus shown that it was studied by a naval engineer after WWII. For 
    these reasons I attempted first to establish the bibliography with the help 
    of the library of the “Musée de la Marine” in Paris and also with the site of 
    Dennert and Pape on the Web. It was unsuccessful.
    > Unfortunately my wife died in July 2004 and obviously it was uneasy for me 
    to continue my research at this time ;  then I had to send my copy in its 
    current state to the editor.
    > Yet, you may read in the first page that I recognize this insufficiency and 
    also the necessity to find more information about the MHR-1.
    > If somebody in the Group accepts to translate in English this paper I would 
    suggest, not to translate it exactly but to rewrite it in English with some 
    improvements and with a larger bibliography. I would suggest also to work 
    together, the translator and I, and consequently to sign together.
    > I gave the MHR-1 at the beginning of 2006 to the “Arithmeum” in Bonn, Germany.
    > I must apologize for my poor English. It is the opinion of my son in law and 
    of my young grand-daughter who are Americans.
    > With my best regards,
    > Serge Savoysky, D ès Sc. 22, allée Danton 91270 Vigneux. 01 69 03 12 74.

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