Real 20th century engineers used Teledeltos paper, not carbon paper. See this article, and the comments about Bob Widlar, probably the best analog electrical engineer ever (well, maybe Faraday…). Google still thinks you can buy it in the UK. http://electronicdesign.com/analog/whats-all-teledeltos-stuff-anyway On Feb 12, 2014, at 4:34 PM, meekerdb <meekerdb@verizon.net> wrote:
When I sailed to Cuba a few years ago the Harbor Master came aboard to fill out paper work. He needed three copies but he only had one (used) piece of carbon paper so he had to fill out two by hand.
Brent
On 2/12/2014 6:55 AM, Henry Baker wrote:
Perhaps it would be difficult to reproduce this experiment today.
Is it even possible to purchase carbon paper anymore?
I heard a program on NPR (Planet Money, perhaps?) where they said that the last bastion of carbon paper was India, where the govt still records lots of official stuff typed on paper with carbon duplicates/triplicates/...
At 02:25 PM 2/11/2014, Richard E. Howard wrote:
The most fun paper in this field (in my opinion) is by Last and Thouless in 1971.
In this era of Higgs Boson-sized experimental budget, it is a study in elegance. They punched carefully randomized holes in carbon paper (2D conducting sheet) and measured the resistivity as a function of hole density.
The experiment trumped the theory at the time and the apparatus (for once) actually cost less than the pencil/paper theory...
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun