Meant to send this to the list, but it went to James F. only--oops. SC -----Original Message----- From: Scott Clauss [mailto:[EMAIL PROTECTED]] Sent: Friday, December 01, 2000 3:30 PM To: [EMAIL PROTECTED] Subject: RE: [USMA:9484] SI is English! The talbot is a unit of luminous (light) energy. One talbot is the energy carried by a light flux of one lumen in one second, that is, the talbot is the same as the lumen second (lm�s). For light of wavelength 555 nanometers (nm), the wavelength to which the eye is most sensitive, the talbot equals 1.464 millijoule. For other wavelengths l, the talbot equals 1.464�V(l) millijoules, where V(l) is the "luminous efficiency," a factor representing the relative sensitivity of the eye at wavelength l. Although the talbot is compatible with the SI, it has not been accepted as part of the International System; the symbol T would not be acceptable since it duplicates the symbol for the tesla. The unit, previously called the lumberg, is now named for the British physicist W.H. Fox Talbot (1800-1877). Above stolen from : http://www.unc.edu/~rowlett/units/dictT.html I don't think you could convert talbots to Sverdrup(m3/s) Janskies(W/m2Hz) per Dobson Unit(m) without extreme difficulty and much hand waving, but Sverdrup was Norwegian, Jansky was American and Dobson was (is?) British--none is French. SC > -----Original Message----- > From: James R.Frysinger [mailto:[EMAIL PROTECTED]] > Sent: Friday, December 01, 2000 2:04 PM > To: [EMAIL PROTECTED]; Scott Clauss; U.S. Metric Association > Subject: Re: [USMA:9484] SI is English! > > > OK, I give up. What's a talbot? The only thing I can find within 2 min > is "Talbot", an English dog that may have been the predecessor for the > bloodhound. > > And while you're at it, how many Sverdrup Janskies per Dobson Unit is > that? ;-) > > Jim > > On Fri, 01 Dec 2000, Scott Clauss wrote: > > I have gotten tired of hearing the British and Americans say that SI is > > French, and isn't their system. This morning while looking at torque > > wrenches it stuck me as odd that they advertize them as using > "English and > > metric" units, but the metric units were newton-meters. I > thought is was > > silly saying Newton wasn't English, so I made this little > table. Appears SI > > is more UK than anything else. What did I miss, and did I get anything > > wrong? > > > > meter From the Latin metrum and the Greek metron, > both meaning "measure." > > kilogram From chilioi, the Greek word for a thousand + the > Latin gramma, > > which was a small weight similar to the English grain > > second the second division of the hour, latin secundus > > ampere French physicist Andr�-Marie Amp�re > > kelvin English (Scottish?) mathematician and > physicist William Thomson, > > later Lord Kelvin > > mole named by W. Ostwald, a German Chemist, from > MOLekulargewicht. > > candela From the Latin word for "candle." > > radian named by James Thomson, brother of Lord > Kelvin, latin radius. > > steradian from the Greek stereos, solid + radian > > hertz German physicist Heinrich Rudolf Hertz > > newton English mathematician, and physicist Isaac Newton > > pascal French mathematician Blaise Pascal > > joule British physicist James Prescott Joule > > watt British engineer James Watt > > coulomb French physicist, Charles-Augustin de Coulomb > > volt Italian scientist Count Alessandro Volta > > farad British physicist Michael Faraday > > ohm German physicist Georg Simon Ohm > > siemens German electrical engineer Werner von Siemens > > weber German physicist Wilhelm Eduard Weber > > tesla (Croatian- (or Serbian-?))American > electrical engineer Nikola Tesla > > henry American physicist Joseph Henry > > degree Celsius Swedish astronomer and physicist Anders Celsius > > lumen from Latin for light > > lux from Latin for light > > becquerel French physicist, Antoine-Henri Becquerel > > gray British physician L. H. Gray > > sievert Swedish physicist Rolf Sievert > > katal From "catalyst"? > > > > Totals: > > Non-proper name origin 10 > > English/British 6 > > German 4 > > French 4 > > American 2 > > Swedish 2 > > Italian 1 > > > > If you add the quasi-SI units of talbot, bel and neper you pick > up two more > > Brits and another American. > > > > After spending some time doing this I found a nice web page that has a > > similar list with pictures of the men (yes they're all men) involved. > > http://indykfi.atomki.hu/indyKFI/MT/orig_si.htm > > Quick what metric derived, but not SI, unit is named after a woman? > > > > And on a off topic, what is the difference between British and > English? I > > suppose they used to swing swords at each other because of the > distinction, > > but in America at least in modern times the distinction has faded. > > > > Since this is non-HTML the columns may get messed up in transit. > > > > Cheers, > > Scott C > -- > James R. Frysinger University/College of Charleston > 10 Captiva Row Dept. of Physics and Astronomy > Charleston, SC 29407 66 George Street > 843.225.0805 Charleston, SC 29424 > http://www.cofc.edu/~frysingj [EMAIL PROTECTED] > Cert. Adv. Metrication Specialist 843.953.7644 >
