Thanks. I will add that to my examples of "Customary is good enough, and the preferred system of measure in the United States is only an optional extra." (along with beer, meat, deli, and other random-weight packages). It certainly helps emphasize that Congress' declaration was lip-service. Another example of how far we are from metricating.
--- On Wed, 8/5/09, James R. Frysinger <[email protected]> wrote: From: James R. Frysinger <[email protected]> Subject: [USMA:45517] Re: Neat chart of English mass units To: "U.S. Metric Association" <[email protected]> Date: Wednesday, August 5, 2009, 2:08 PM Apparently Troy pounds are out (at least for precious metals) but Troy grains, pennyweights, and ounces are in. The following is from NCWM Handbook 130 (2006): 2.17. Precious Metals 2.17.1. Definition 2.17.1.1. Precious metals. - Gold, silver, platinum, or any item composed partly or completely of these metals or their alloys and in which the market value of the metal in the item is principally the gold, silver, or platinum component. 2.17.2. Quantity. - The unit of measure and the method of sale of precious metals, if the price is based in part or wholly on a weight determination, shall be either troy weight or SI units. When the measurement or method of sale is expressed in SI units of mass, a conversion chart to troy units shall be prominently displayed so as to facilitate price comparison. The conversion chart shall also display a table of troy weights indicating grains, pennyweights, and troy ounces. (Added 1982) http://ts.nist.gov/WeightsAndMeasures/upload/11_IV_MethodReg-06-H130-FINAL.pdf Jim James R. Frysinger wrote: > > Troy pounds and Troy ounces have long been and I believe still are used in > the U.S. trading in precious metals. I believe that (Troy) pennyweights fall > into that category, too. > > Jim > > John M. Steele wrote: >> Maybe, superb chart of units of mess? :) >> If I look at how they handled the various pounds, the av. lb and stone lead >>to different quarters, hundredweights and tons, which should be set up as >>separate ellipses, particularly since the long and short ton and its >>subdivisions are a modern "two peoples divided by a common language" issue. >> As far as I know the troy pound (and all the others except av. pound) is >>not legal for trade in the US or UK, and has no real relevance. However, the >>troy ounce continues for precious metals. >> >> --- On *Wed, 8/5/09, James R. Frysinger /<[email protected]>/* wrote: >> >> >> From: James R. Frysinger <[email protected]> >> Subject: [USMA:45511] Neat chart of English mass units >> To: "U.S. Metric Association" <[email protected]> >> Date: Wednesday, August 5, 2009, 11:45 AM >> >> >> Wow! This is a superb "graph" (I call it a chart) of the units of >> mass (commonly called "weight") used in England and the numerical >> relationships among them. So far as I can tell it's accurate; it >> jibes with the numbers and history that I know. For one, you can see >> where that figure of 5760 grains per Troy pound came from! >> >> You will see on here 5 "pounds" listed and they all differ in size. >> A similar situation in France is what led them to chuck out the >> whole mess and to devise a "simple decimal system" that we now call >> the metric system. >> >> http://en.wikipedia.org/wiki/File:English_mass_units_graph.svg >> -- James R. Frysinger >> 632 Stony Point Mountain Road >> Doyle, TN 38559-3030 >> >> (C) 931.212.0267 >> (H) 931.657.3107 >> (F) 931.657.3108 >> > -- James R. Frysinger 632 Stony Point Mountain Road Doyle, TN 38559-3030 (C) 931.212.0267 (H) 931.657.3107 (F) 931.657.3108
