RoadTrip America

Routes, Planning, & Inspiration for Your North American Road Trip

What IS This Thing?

What IS That Thing?A. A "spectral radiometer" used to measure light energy from the sun

B. A "pigtail" electron cannon

C. A double-barreled stationary laser gun used as a prop in the movie "Alien Resurrection"

D. A hydrometer used by agricultural biologists to test moisture levels inside seeds and kernels


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