I agree, Robert. Although SI 10 talks about liter and other units as being "units in use with SI," we are trying to convince people to use the Modern Metric System, which includes both SI units and "units in use with SI." Those who are as concerned as we are with the minutiae will understand the "in use with SI" status of the liter. Those who are not will simply regard liter and milliliter as metric (which is part of our goal). (If they want to understand their blood test results, they'll need to know about deciliters, too.)
On the more esoteric side, those in the various scientific fields should be aware of the obsolete and highly-deprecated status of dynes, ergs, �ngstr�ms, etc. The layperson will not, of course, be aware (nor need to be) either of those or of the corresponding units that are now the correct SI units. Bill Potts, CMS Roseville, CA http://metric1.org [SI Navigator] >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >Behalf Of [EMAIL PROTECTED] >Sent: Wednesday, November 05, 2003 13:38 >To: U.S. Metric Association >Subject: [USMA:27468] Litre is an SI unit > > > 2003 November 5 >27444 starts out "First of all, the litre is not an SI unit." > This is a big mistake. What should be said is that > "The litre is not a coherent SI unit." > >We want the public to accept and use the decimal metric system of >units. We call it SI but there are multiples and some outliers >like litre which are not coherent. If we say the multiples and >outliers are not in the system, people will say we are nuts. >Regardless of what CIPM says, millimetre is SI, litre is SI. >Otherwise we are out of business. >The units in Tables 6 and 7 of SI10 are SI. To say otherwise is >to shoot ourselves in the foot. > Robert Bushnell PhD PE > chair ASTM Committee E43 on SI Practice >
