[Taxacom] Units of length in Francis Walker's descriptions of insects

Peter Rauch peterar at berkeley.edu
Sun Nov 4 11:58:59 CST 2018


Go to http://taxacom.markmail.org

and search for

date:2005 ancient measurement

to retrieve the three postings that discuss this "lines" topic referred to
by Pierre (below).

Peter

On Sun, Nov 4, 2018 at 9:28 AM Pierre Morisset <
pierre.morisset at globetrotter.net> wrote:

> This was discussed in Taxacom some years ago, around 2005 if my memories
> are right.I had copied the exchange in a Word document. Here it is in
> case it might be useful to some of you.
>
> Pierre Morisset
>
>   le 04-11-2018, Dr Brian Taylor a écrit :
> > My understanding, as an entomologist and I am almost sure it is as was
> used
> > in the Francis Walker's descriptions, is that one line = 1/12 of an
> imperial
> > inch, i.e. 1 line = 2.117 mm.
> >
> > On 04/11/2018, 14:04, "Mary Barkworth" <Mary.Barkworth at usu.edu> wrote:
> >
> >> From wikipedia:
> >> "The line (abbreviated L or l or ‴ or lin.) was a small English unit of
> >> length, variously reckoned as 1⁄10, 1⁄12, 1⁄16, or 1⁄40 of an inch. It
> was
> >> not included among the units authorized as the British Imperial system
> in
> >> 1824".
> >> I had thought it was 1/12 of an inch. Wrong, again. Does anyone know
> whether
> >> one usage prevailed in a particular discipline? Using 1/12 gave me
> numbers
> >> that seemed reasonable when looking at grass descriptions.
> >>
> >>
> >> -----Original Message-----
> >> From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu> On Behalf Of
> Dilrukshan
> >> Wijesinghe
> >> Sent: Sunday, November 4, 2018 6:58 AM
> >> To: Taxacom List <taxacom at mailman.nhm.ku.edu>
> >> Subject: [Taxacom] Units of length in Francis Walker's descriptions of
> insects
> >>
> >> This must be common knowledge to entomologists better informed than I
> am: Can
> >> someone tell me if the units in Francis Walker's descriptions of
> insects are
> >> tenths of an inch? E.g. does "5 1/2 lin." = 0.55 inch?
> >>  Thanks.
> >>
> >> Priyantha
> >> D. P. Wijesinghe
> >> dpwijesinghe at yahoo.com
>


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