ZBL 1:10,000

Test the air before descending.?ÿ Confined space work can be dangerous.

Whoever is most visible gets asked the questions.?ÿ I once ran a level line between two NGS bench marks to see if I believed one was really in the or...

A variation that might catch their attention would be to repeat the Smoot process, and find the length of the hallway in Jacobs or Ethans.

The US National Council of Teachers of Mathematics recommends giving students an acquaintance with multiple systems of measurement. -----------------...

If each surveyor looked only at one lot each, working from some few found monuments, then they didn't do a proper job.?ÿ They need to consider the lot...

I saw this on a web site, indicating that does not necessarily preclude it: In general, excimer lasers?ÿthat are FDA-approved for LASIK surgery perfo...

I have an older model similar to this one.?ÿ It gives a strong indication when I slide it over a tack in a board. It finds iron, copper, aluminum, any...

If all else about your eyes is compatible, that extreme correction would make you a prime candidate for Lasik.?ÿ If I computed that right, your eyes f...

The lesson is, "Pick a datum realization and geoid and stick with them for your whole project."?ÿ Later ones will be self-consistent over a larger are...

Not just for thinking.?ÿ I had an uncle who threw tires into and out of the curing molds for 30 years.?ÿ He said whenever the stopwatches came around ...

Oh, but note that PW0502, less than a hundred yards north, has the same name, is 1st order, and has superseded NAD27 data. It was monumented in 1925. ...

Which one? Note that NAD27 is given on the one discussed above. You can also go to ?ÿ?ÿ Enter the PID, fetch the geocaching page, and then click on "...

Back in your father's day that was all that was available.?ÿ Now the $20 electronic ones use capacitive sensing and are much more sensitive to what's ...

You could try a carpenter's stud finder. Besides sensing wood behind drywall, their response may be affected by any metal. I don't believe there would...