Duncan Bath asked in USMA 19794 >Joe, I've probably got your bulletin on "Preferred Number" sequences. >In any case, could you provide this thread with some real input? >Duncan >-----Original Message----- >From: Barbara and/or Bill Hooper <[EMAIL PROTECTED]> >To: U.S. Metric Association <[EMAIL PROTECTED]> >Date: April 29, 2002 15:43 >Subject: [USMA:19794] RE: Metric Standards and the USMA > > >>> Is there some way that an agreement can be made on ... allowing >>> a broader range of sizes, but sizes that fall in increments >>> of say in 10 mL or 10 g increments up to 1 L and 1 kg ... etc. >> >>One rational series of sizes for everything (mass, volume, length, etc.) >>would be: >>1 >>2 >>5 >>10 >>20 >>50 >>100 >>200 >>500 >>1000 >> >>Continue this pattern or switch to a bigger prefix on the units when >>reaching 1000.
>>Regards, Bill Hooper
R'3 R5 R10 R20 R40
-- -- -- -- --
1 1 1 1 1
1.06
1.12 1.12
1.18
1.25 1.25 1.25
1.32
1.4 1.4
1.5
1.6 1.6 1.6
1.7
1.8 1.8
1.9
2 2 2 2
2.12
2.24 2.24
2.36
2.5 2.5 2.5 2.5
2.65
2.8 2.8
3
3.15 3.15 3.15
3.35
3.55 3.55
3.75
4 4 4 4
4.25
4.5 4.5
4.75
5 5 5 5
5.3
5.6 5.6
6
6.3 6.3 6.3 6.3
6.7
7.1 7.1
7.5
8 8 8
8.5
9 9
9.5
10 10 10 10 10
The above table is a consolidation of ISO 3, ISO 17, and ISO 497 of 1973,
which were copied from the pre-war DIN 323. The series that I have denoted
as R'3 is very common although it does not appear in these documents..
Joseph B.Reid
17 Glebe Road West
Toronto M5P 1C8 Tel. 416 486-6071
