Tim,
There are plenty of us out here (scientists, engineers, consultants,
ordinary people, etc.) who disagree with Robert's position on
centimeters. We happen to think that they are just fine and dandy.
In fact, you may have read some of my recent postings about teaching
kindergartners to measure things in centimeters (that scale best suits
them) and to use a meter stick marked off in centimeters but not
millimeters as a number line to accomplish addition of two-digit numbers.
If it makes you feel any better, centimeters are considered to be just
fine and dandy by the likes of the CGPM, the CIPM, and the BIPM. And,
hey! They are the ones who maintain and administer the SI!
Nobody is forcing Robert or the others in his camp to use centimeters
against their will. Do not allow them to force you to shun centimeters
against your will. I would like to see Americans adopt the entire SI,
not just the parts favored by some people.
Jim
On 2011-02-07 1614, Robert H. Bushnell wrote:
201 Feb 7
Tim,
1. You have an error in the cost of item 1)
The error is in line d. (which you list as c.)
1000 x $280.00 is $280,000.00, not $2,800,000.00.
2. For the classroom kit item 1) you show 30 cm rulers.
Society should generally avoid centimeter. Centimeter is too coarse a
unit and does severe damage in commercial use and to efforts to get
rid of inch-pound units. I recommend that item 1) be 300 mm rulers.
200 mm rulers from USMA show 20 cm on the back (without
millimeter marks). This is a mistake and is useful only for first
grade teaching to count. We do not need to contaminate
measurement with centimeter. Counting can be taught with other tools.
Good luck.
Robert Bushnell
--
James R. Frysinger
632 Stony Point Mountain Road
Doyle, TN 38559-3030
(C) 931.212.0267
(H) 931.657.3107
(F) 931.657.3108
