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    Re: Tables of Trig Functions and Logs of Trig Functions
    From: Robert Eno
    Date: 2007 May 2, 23:43 -0400
    Thanks Chuck and all who responded.
    10 x 450 pages eh?  Hmmmm..... Maybe I will just stick with that small booklet I already have.
    ----- Original Message -----
    Sent: Wednesday, May 02, 2007 10:50 PM
    Subject: [NavList 2801] Re: Tables of Trig Functions and Logs of Trig Functions


    I recently found a copy of "Chambers's Seven-Figure Mathematical Tables  Edited by James Pryde, F.E.I.S. with a Greatly Extended 'Explanation of the Tables'". It was published by W. & R. Chambers, Limited, London and Edinburgh. Original Edition Dec. 1878, Latest reprint 1943.

    The preface says, "This extensive collection of Mathematical Tables comprehends the most important of those required in Trigonometry, Mensuration, Land-surveying, Navigation, Astronomy, Geodetic Surveying, and the other practical branches of the Mathematical Sciences." I was slightly disappointed to discover when I got home that it did not include tables of haversines.

    I think I found my copy in a used book store in Victoria, British Columbia, Canada. I see 30 copies available at abebooks.com.

    It gives trigonometric functions to the minute of arc, plus differences between adjoining entries. It recommends linear interpolation for interpolation to the nearest second of arc. I was attracted to it because most tables only give 5 figures.

    Besides the usual tables of logs and natural and logarithmic trig functions, it includes traverse tables, meridional parts, "Diurnal Proportional Logarithms", and "Ternary Proportional Logarithms". There are 41 tables in all, if I counted correctly.

    I don't think you will find a set of tables that go to 0.1 minute of arc.  These tables run to 450+ pages. To go to 0.1 minute of arc would require 10 times the number of pages, or much smaller type.

    Best regards,
    Chuck Taylor
     48 N
    121 W

    Robert Eno wrote:

    I am looking for a set of tables which provides trig functions and logs of trig functions down to the 10th of a minute of arc. Is anyone aware of any publications that provide this?

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