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
Get the RTA New This Week widget and many other great free widgets at Widgetbox!
LAUGHING DOWN THE ROAD Caution: Funny Signs Ahead
What IS This Thing?
A.
