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    Possible limitaion for distance measurement
    From: Kent Nordström
    Date: 2009 Mar 11, 17:16 +0100

    Again thanks for your views regarding possible limitations in lunar distances. I have gone through almost a dozen old manuals and I have not found any stated limitation such as in the German manual from 1906. I didn’t expect to find anything either. The only limitation I have found in e.g. Tables Requisite from 1766 is about very short lunar distances, which should require 6 fig logarithms and not 5 fig as usually used. The limitation is in this context of no interest because distances less than about 30 degrees were not taken because short distances were not tabulated in old NA’s. But there might be of interest to check the background to the German manual with an other approach. On the pages Wolgang Körberer kindly provided there is a foot note down on page 385 saying (my translation) that a comprehensive explaination for these methods can be found in “Allgemeinen Encyklopadie der Physik” issued by G. Karsten, in the chapter about “time and finding positions”, this chapter written by G.D.E. Weyer. I have tried to find this reference on the internet without success. I am going to alert my collegue about this hoping for an answer. But perhaps somebody else has the above encyklopedie available and would like to check.

    Kent N


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