Be aware that a water level can give false readings also. Just think what
happens on a sunny day when the water in the two ends may be of different
temperatures.

George (another George) Willer

"George" wrote in message
...

"Dave Hinz" wrote in message
...
On Thu, 10 Mar 2005 14:28:08 GMT, RoyJ wrote:
You can do a nice job with one of the el-cheapo laser levels. This one
is $10 at Harbor Freight.

Problem with a laser level, is you get a nice straight line, but your
level is only as good as that bubble on that tiny level. For a few
feet, you're probably right on. But, how much error in that bubble would
it take to be off by an inch, at 50 feet? Not a hell of a lot. Water is
much more dependable, can't be mis-calibrated, and has been in use as a
level for laying out buildings, since the pyramids were built.

Exactly, the word "laser" makes it sound like no errors are possible even
on
an el-cheepo version.