On 11/3/2009 7:17 PM, clipka wrote:
> The traditional US-american printers' "pica point" was defined for one
> pica (12 points) to be 0.166 inch (giving ca. 72.29 points per inch).
> TeX, being quite traditionalistic regarding typesetting, probably bases
> its definition on this older standard, although I'm quite puzzled why it
> uses the slightly lower value of 72.27 (not 72.72). Maybe it has to do
> with the evolution of the inch since the day the "pica point" was
> standardized. Also, there seems to have been alternative suggestions for
> the definition of the pica point back in the time when it was
> standardized in 1886, one if which would have resulted in exactly 72.27
> points per inch.
>
> However, /the/ "DTP point" gives exactly 72 points per inch, and any
> software using a different definition is a rare exception.

Pica pica!

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Mike

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