In article , "Leon" wrote:

"Doug Miller" wrote in message
. ..
In article , Richard Evans
wrote:
An interesting low-tech gadget. It has two scales, one on each edge.
They are both labelled in inches, but the second scale is actually 50%
the size of the first one. To find the center of what you are
measuring, read the true scale, then find the corresponding number on
the other edge. That is the center.

It's pretty easy to find centers if you're using a metric tape measu
just
measure the width and divide by two -- which is much easier using a whole
number of millimeters than when using fractional inches. (Quick -- what's
half
of 55 13/16 inches?)


What's half of 536 3/8 mm? ;~)

g My metric tapes don't indicate fractional millimeters. Dunno about yours.