The file hersh.oc files contain approximately 19 different fonts in the
A-Z alphabet plus greek and cyrillic, along with hundreds of special symbols,
described generically below.

Fonts:
        Roman: Plain, Simplex, Duplex, Complex Small, Complex, Triplex
        Italic: Complex Small, Complex, Triplex
        Script: Simplex, Complex
        Gothic: German, English, Italian
        Greek: Plain, Simplex, Complex Small, Complex
        Cyrillic: Complex

Symbols:
        Mathematical (227-229,232,727-779,732,737-740,1227-1270,2227-2270,
                        1294-1412,2294-2295,2401-2412)
        Daggers (for footnotes, etc) (1276-1279, 2276-2279)
        Astronomical (1281-1293,2281-2293)
        Astrological (2301-2312)
        Musical (2317-2382)
        Typesetting (ffl,fl,fi sorts of things) (miscellaneous places)
        Miscellaneous (mostly in 741-909, but also elsewhere):
                - Playing card suits
                - Meteorology
                - Graphics (lines, curves)
                - Electrical
                - Geometric (shapes)
                - Cartographic
                - Naval
                - Agricultural
                - Highways
                - Etc...

The Oriental Characters.

        The file hersh.or contains over 1000 Kanji, or Chinese characters,
and the Japanese Hiragana and Katakana alphabets.

ASCII sequence translation files:

        The Hershey glyphs, while in a particular order, are not in an
        ASCII sequence. Translation Files are provided that give the
        pairs of glyph numbers that make up a font. Pairs of glyph numbers
        where the second number is zero are considered to define a single
        character represented by the glyph number of the first.

        File names are made up of fffffftt.hmp,

                where ffffff is the font style, one of:
                        roman   Roman
                        greek   Greek (some characters not placed in 
                                        sequence)
                        italic  Italic
                        script  Script
                        cyril   Cyrillic (some characters not placed in
                                           sequence)
                        gothgr  Gothic German
                        gothgb  Gothic English
                        gothit  Gothic Italian

                and tt is the font type, one of:
                    p       Plain (very small, no lower case)
                    s       Simplex (plain, normal size, no serifs)
                    d       Duplex (normal size, no serifs, doubled lines)
                    c       Complex (normal size, serifs, doubled lines)
                    t       Triplex (normal size, serifs, tripled lines)
                    cs      Complex Small (Complex, smaller than normal size)

        Greek and Cyrillic have had their characters arranged appropriate
        to similar sounding letters in the roman alphabet. This may seem
        a little odd - but it does work rather well - well here anyway!

The following is the mapping of index files to current VOGLE font names:

                astrol.hmp              astrology
                scripts.hmp             cursive
                cyrilc.hmp              cyrillic
                romans.hmp              futura.l
                romand.hmp              futura.m
                gotheng.hmp             gothic.eng
                gothger.hmp             gothic.ger
                gothita.hmp             gothic.ita
                greeks.hmp              greek
                marker.hmp              markers
                lowmat.hmp              math.low
                uppmat.hmp              math.upp
                meteo.hmp               meteorology
                music.hmp               music
                scriptc.hmp             script
                symbol.hmp              symbolic
                greekc.hmp              times.g
                italicc.hmp             times.i
                italict.hmp             times.ib
                romanc.hmp              times.r
                romant.hmp              times.rb
                japan.hmp               japanese


The three sizes are coded with particular base line (bottom of a capital
letter) and cap line (top of a capital letter) values for 'y':

        Size            Base Line       Cap Line

        Very Small         -5              +4 
        Small              -6              +7
        Normal             -9              +12

        (Note: some glyphs in the 'Very Small' fonts are actually 'Small')

The top line and bottom line, which are normally used to define vertical
        spacing, are not given. Maybe somebody can determine appropriate
        values for these!

The left line and right line, which are used to define horizontal spacing,
        are provided with each character in the database.