[USMA:22899] RE: Mishmash of units at the liquor store

[Joseph B. Reid]

I wrote in USMA 22860

Terry Simpson wrote:

However 'cubic cm' or 'cm3' would be fine. In fact, it would be
excellent since ml is not an SI unit whereas cm3 is.

Joseph B. Reid wrote:

Terry's impression would have been correct from 1901 until 1964.

[...]

The litre was redefined as 1 dm3 by the 12th CGPM in 1964,

[...]

The litre is a "Non-SI unit accepted for use with the International

System"

Terrry Simpson replied in USMA:22870:

I am not sure what you mean. I said that the ml is not an SI unit. Are
you saying that it is or it isn't?

I did not express an opinion; I merely quoted the metric bible. Terry is right that the litre is not, strictly speaking, an SI unit. However it is "accepted for use with the International System". However, the litre is a metric unit.

Joseph B. Reid
17 Glebe Road West
Toronto M5P 1C8 Telephone 416-486-6071