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    Re: recommendation for slide rule ?
    From: Gary LaPook
    Date: 2009 May 20, 20:17 -0700

    Speaking of the Bygrave, I have not heard back from any of the many
    people who expressed interest a couple of months ago in making their
    own  copies of it. Has anybody made one and how do you like using it?
    On May 20, 8:05�pm,  wrote:
    > Here's 15 slide rule steps to do Bygrave. �I'd call it a tie with Gary's 16 
    counting his first two as really one. �The T (tangent) scale gets a little 
    confusing at angles above 45.
    > line up T with D, set cursor at d on T
    > move t on red S to cursor
    > move corsor to index on S
    > line up T with D, read y on T at cursor: =>y
    > calculate Y=y+90-Lat: �=>Y
    > set cursor at t on T
    > set index on cursor
    > move cursor to red y on S
    > move Y on red S to cursor
    > read red T at right D index: �=>AZ
    > line up T with D, move cursor to red Az on S
    > move index on T to cursor
    > move Y on T to cursor
    > move cursor to value at index on DI
    > line up T with D, read Hc on T at cursor: =>HC
    > �SECcscFORMULA.xls
    > 24KViewDownload
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