
Re: [HM] "portagraion"  a "mathematical instrument" circa 1745?
Posted:
Feb 8, 2006 9:27 AM


James A. Landau forwarded a puzzling question from an other list, about what a "portagraion"could be.
> Stephen Greenleaf, Mathematical InstrumentMaker...;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 "Portecrayon", 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/ 

