Felice > wrote:

:"David Scheidt" > wrote in message
...


:<snip>
:> As long as you use the same measuring cup. They're remarkably
:> inaccurate. And lots of things you measure in them are hard to
:> measure accurately, because they've got an opaque meniscus.

:An "opaque meniscus"? That sounds serious. I hope there's a cure.

When you pour a liquid into a clean container, it tends to climb up
the walls (down, if you're measuring mercury). That film is the
meniscus. If you don't account for it, you'll read the contents of
cup as higher than they actually are. Water is easy to adjust for,
since it's transparent. Milk, oils and the like are harder, as
they're opaque.