Category Archives: Survey Artifact Collection
Survey Artifact Collection
The Society has a diverse collection of donated survey artifacts. These are grouped together by...
Altimeters
Altimeters measure the height above sea level by measuring barometric pressure. Altimeters and barometers are...
Altimeter, Pennwalt Wallace & Tiernan
This altimeter is one of a pair. They are marked “Pennwalt” “Wallace & Tiernan” Model...
Altimeter, Short & Mason
F.2453. This altimeter is calibrated in feet and inches of mercury. Pocket watch style brass...
Altimeter, Topley
This altimeter is marked “No. 8070, Compensated, The Topley Company, “D.L.S. special.” It comes with...
Altimeter, American Paulin Systems
Altimeter, Micro, Model M-2, s/n NS1201K, with Manual "American Paulin System, Altimetry Manual"
Altimeter, Thommen Everest
Hand held THOMMEN EVEREST pocket altimeter. This altimeter is made of leather plastic and metal...
Altimeter, E.R. Watts & Son
Brass altimeter, 8 cm in diameter x 3 cm depth with a glass cover. The...
Calculators Manual
In 1642, Blaise Pascal is credited with designing one of the earliest forms of a...
Calculator Manual, DIGI-matic
Hand held calculator Simpsons Sears Model Digi-matic 8 Model 41030, S/N 135988. This calculator is...