Scientific Instruments & Appliances mariner's compass is an apparatus for determining direction, graduated to indicate 33 directions. the "n" point on the dial indicates north pole and the "s" point, south pole.
Scientific Instruments & Appliances periscope is an apparatus for viewing objects lying above the eye level of the observer and whose direct vision is obstructed.
Scientific Instruments & Appliances salinometer is a type of hydrometer used to determine the concentration of salt solutions by measuring their densities.
Scientific Instruments & Appliances spectrometer is a type of spectroscope so calibrated as to make it suitable for the precise measurement of refractive indices.
Fact
As of 1996, Hee Haw holds the record for the longest running weekly first-run syndicated show in the history of television. It spanned over 4 decades, from the late '60s to the early '90s, airing every Saturday night at 7:00. .. More >>