Florida is low elevation, and you may have been in a location where the SPC scale factor is close to 1.00000 The poster is in Wisconsin at a higher e...

Try it and you'll see it's not wrong.?ÿ A magnifier doesn't magnify unless there is some distance. You would hardly notice the difference just with th...

I get 10 cm OD.

So how was the cylindrical part used?

I'd re-categorize that as two lists: Nasty irritants: chiggers (especially so because you don't see them), mosquitos, urushiol plants, biting flies, a...

People tend to be immune until they aren't any more, often triggered by a large contact incident. I never had a reaction and certainly had walked thr...

The sooner it is washed the better.?ÿ It binds chemically with the skin, so after a few hours it is stuck, and you are waiting for a layer to wear off...

I can sort of see it, but the barrel isn't in proportion, so I don't see it without trying.

The new definition of official elevation will be GNSS tied to CORS, plus a gravity model to convert ellipsoidal height to orthometric.?ÿ If you want a...

originals were sealed lead acid.

Sounds like an efficient way to get redundancy. Re-centering (and releveling if not automatic), not just measuring twice, seems an important part of i...

Tape the distances 2-8, etc. for additional checks.

Machinist's level?