The metric carat was agreed by the GCPM in 1913. Although it was depreciated with the advent of SI, the EU directive on metrication has included it as a unit that may be used (http://europa.eu.int/eur-lex/en/consleg/pdf/1980/en_1980L0181_do_001.pdf). The EU directive did not sanction the use of barrels for measuring oil.
Both of these could well cause problems in 2010, but in practice problems will only be caused if people start abusing these "irregular" units. > Original Message ----- From: "STANLEY DOORE" <[EMAIL PROTECTED]> To: "U.S. Metric Association" <[email protected]> Cc: "U.S. Metric Association" <[email protected]> Sent: Saturday, January 20, 2007 12:18 PM Subject: [USMA:37801] Re: piecemeal metrication > You're right! Carats as in jewelry should be in (milligrams - mg) and > barrels of oil etc. should be in cubic metres (kilolitres - kL) or tonnes. > > I'm not sure what the conversion factors are for carats and barrels; > however, they can and should be derived and included in conversion tables > and software converters if not already. > > It sure would be nice to be on a single SI units standard. > > Stan Doore > > > > ----- Original Message ----- > From: "Paul Trusten, R.Ph." <[EMAIL PROTECTED]> > To: "U.S. Metric Association" <[email protected]> > Cc: "U.S. Metric Association" <[email protected]> > Sent: Friday, January 19, 2007 11:09 PM > Subject: [USMA:37795] Re: piecemeal metrication > > > > And carats in jewelry, too. I was to understand that one carat = 0.2 g. Is > > that > > so? > > > > Quoting STANLEY DOORE <[EMAIL PROTECTED]>: > > > >> In some parts of the world, gold is sold by the gram and not by the > >> ounce. > >> Why not make grams (SI) standard to avoid confusion so people will be > >> able > >> to understand how much they are actually buying? > >> > >> Stan Doore > >> > >> > >> ----- Original Message ----- > >> From: Martin Vlietstra > >> To: U.S. Metric Association > >> Sent: Thursday, January 18, 2007 4:44 PM > >> Subject: [USMA:37782] Re: piecemeal metrication > >> > >> > >> Mike, > >> > >> It is usual in Europe to measure fuel consumption in L/100 km. If you > >> regard a litre of fuel as a unit of currency, then this is directly > >> analgous > >> to buying apples at 75c/kg or gold at $624.45/troy oz etc. Also, > >> expressing > >> fuel consumption that way round makes it easier to calculate the cost of > >> fuel > >> per km, the cost of tyres per km, the cost of tax and insurance per km > >> (assuming a fixed annual amoutn of travelling) etc. > >> > >> Martin > >> ----- Original Message ----- > >> From: Bill Hooper > >> To: U.S. Metric Association > >> Sent: Tuesday, January 16, 2007 5:49 PM > >> Subject: [USMA:37754] piecemeal metrication > >> > >> > >> > >> > >> On 2007 Jan 16 , at 8:38 AM, Mike Millet wrote: > >> That's why the best and smoothest transition in the US ... (will be) > >> ... > >> rather from slow gradual economic and societal change. > >> > >> > >> "Slow" and "gradual" means difficult and expensive. During a long, > >> slow > >> transition, both the old and new systems would be in effect causing a > >> great > >> deal of confusion and extra work. Furthermore, when two systems are both > >> in > >> effect, people would tend to continue using the old, familiar system. > >> They > >> would not "gradually become familiar" with the new one. > >> > >> > >> Mike goes on to say: > >> give the US consumer some time ... (to become accustomed to dual > >> labeling) ... then gradually introduce temperature and fuel and finally > >> road > >> signage changes. > >> > >> > >> It's difficult to change one things at a time because there are so > >> many > >> interconnections between units. If one changes fuel measurement at one > >> time > >> and road signage (including distance) at another time, when do you change > >> fuel economy figures from miles per gallon to kilometres per litre (or > >> litres > >> per 100 kilometres)? > >> > >> > >> Do you first change from miles per gallon to miles per litre (when > >> litres > >> are adopted) and then change from miles per litre to kilometres per litre > >> at > >> a later time (when kilometres are adopted). That would mean having to > >> make > >> TWO changes instead of just one for fuel economy alone (in addition to > >> the > >> necessary changes from gallons to litres and from miles to kilometres. > >> > >> > >> Thus, instead of making a total of three changes at one time: > >> gal. to L, > >> mi. to km, > >> mi/gal to km/L > >> you'd have to make FOUR changes spread out over an extended period of > >> time: > >> gal. to L, > >> mi./gal. to mi./L, > >> mi. to km, > >> mi./L to km/L. > >> > >> > >> Another example would be cooking times based on oven temperature and > >> amount of food. We have charts or directions in Fahrenheit and pounds; we > >> will need to get to Celsius and kilograms. > >> Do we make TWO changes, first from Fahrenheit+pounds to > >> Celsius+pounds > >> and later a second change from Celsius+pounds to Celsius+kilograms? How > >> foolish when we can do it in one change if we convert all things > >> simultaneously. > >> > >> > >> There are other relationships that cause would cause problems, too. > >> We > >> know (actually I had to look up this first one) that there are 231 in^3 > >> in a > >> gallon and 1000 cm^3 in a litre. If we convert volumes from gallons to > >> litres > >> before we convert inches to centimetres, then in the interim (when we are > >> using litres and inches), do we need to know how many cubic inches there > >> are > >> in a litre? (The answer is 61.023 7441, by the way.) Again, MORE > >> conversions > >> are needed when changes are made in several steps instead of all at once. > >> > >> > >> > >> > >> Regards, > >> Bill Hooper > >> Fernandina Beach, Florida, USA > >> > >> > >> ========================== > >> SImplification Begins With SI. > >> ========================== > >> > >> > > > > > > -- > > Paul Trusten, R.Ph. > > Public Relations Director > > U.S. Metric Association, Inc. > > Phone (432)528-7724 > > www.metric.org > > 3609 Caldera Boulevard, Apartment 122 > > Midland TX 79707-2872 USA > > mailto:[EMAIL PROTECTED] > > http://home.grandecom.net/~trusten > > > > > > >
