Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Inactive » Historia-Matematica

Topic: [HM] "portagraion" -- a "mathematical instrument" circa 1745?
Replies: 4   Last Post: Feb 9, 2006 4:17 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Udai Venedem

Posts: 19
Registered: 2/16/05
Re: [HM] "portagraion" -- a "mathematical instrument" circa 1745?
Posted: Feb 8, 2006 9:27 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply


James A. Landau forwarded a puzzling question from an other list, about
what a "portagraion"could be.

> Stephen Greenleaf, Mathematical Instrument-Maker...;Makes and mends
> all Sorts of Mathematical Instruments, as Theodolites, Spirit Levels,
> Semicircles, Circumferences, and Protractors, Horizontal and
> Equinoctal [sic] Sun Dials, Asimuth and Amplitude Compasses,
> Elliptical and Triangular Compasses, and all Sorts of common
> Compasses, drawing Pens and Portagraions...; with sundry other
> Articles too tedious to mention.


Apparently, it is quoted from an old catalogue of instruments, and it
comes just after "drawing Pens". My suggestion is "portagraion" could
mean "Porte-crayon", that is a box to keep various pens. Have a amused
look at

http://chezlorry.ca/EvenSpec/FeteMere/Bricolages/Portecrayon.htm

Udai Venedem
http://aaaa.fr.eu.org/alta.mathematica/
--------------------------




Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.