To:	opendos AT delorie DOT com
X-Comment-To:	rgrunsk AT attglobal DOT net
References:	<200104072210 DOT SAA14388 AT delorie DOT com>
Message-Id:	<2.07b7.1Z13CP1.GBG20H@belous.munic.msk.su>
From:	"Arkady V.Belousov" <ark AT belous DOT munic DOT msk DOT su>
Date:	Sun, 8 Apr 2001 02:48:17 +0400 (MSD)
Organization:	Locus
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Subject:	Re: [off-topic] shutting down
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Reply-To:	opendos AT delorie DOT com

X-Comment-To: rgrunsk AT attglobal DOT net

Hi!

7-áÐÒ-2001 18:00 rgrunsk AT attglobal DOT net (rgrunsk AT attglobal DOT net) wrote to
opendos AT delorie DOT com:

>>     In 1975 Congress of USA decise to accept SI metric system in the
>>10 years period, but up to now there used non-metric units like `inch',
>>`foot', `lb', `gallon', etc. More worser, American units differes from
>>English: English gallon=4.54 litre, American gallon=3.78 litre. Same
>>for most other units, including inch.
rn> There is a US and Imperial system of measure for volume (Ounce, gallon
rn> etc) but the units of linear measure and all others are the same. There
rn> is *NO* such thing as a US Inch vs an Imperial Inch. You may be thinking
rn> of the statute mile and the nautical mile (knot) which are two different
rn> measures.
rn> Most Commonwealth countries have now gone to SI units but the Imperial
rn> system is still legal and used.

     Anywhere I encounter measurement units in English context there is
"foot", "Farenheit", "inch", "mile", "lb", etc. without even reference that
SI system is known in America at all...

rn> In Canada, lumber measurements are still
rn> given in inches.

     Well, lets look in history. In 1737 french publisher Furnje propose to
measure size of typography fonts in points and in the end of XVIII this was
enhanced by Dido. This system relate to 12-base system of foots and inches.
Now there present next measures:

Dido (European/Russian) typometric system:
        1 point = 0.0148 inches = 0.376 mm = 1.070 English points
        10 points = 0.1480 inches = 3.759 mm = 10.707 English points
        96 points = 1.4208 inches = 36.086 mm = 102.784 English points

English (UK/USA) typometric system (Pica system):
        1 point = 0.0138 inches = 0.351 mm = 0.934 Dido points
        10 points = 0.1383 inches = 3.514 mm = 9.34 Dido points
        96 points = 1.3280 inches = 33.734 mm = 89.664 Dido points

So, 1 UK/USA point = 0.934 Dido points, 1 inch = 73,3 UK/USA points = 67,5
Dido points = 25,4 mm. More worser, most publishing software uses 1 inch =
72 points equality.

     So, I was wrong when say that inches for English and American differs,
but this anyway not comparable with European systems. Also, there differs
fonts names:

3 points = four-to-pica/excelsior (UK/USA) = Brilliant (German/Russian)
4 points = brilliant (UK/USA) = Diamant (German/Russia)
etc.

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