Compass. The compass has a free-swinging magnetic needle (red/white) pointing to a dial. The dial is graduated in degrees and shows the cardinal points: north (N), south (S), east (E) and west (W). The needle aligns itself with the local lines of magnetic force to indicate the direction of the north and south magnetic poles.
August 4th, 2016
Viewed 141 Times - Last Visitor from Guangzhou - China on 06/01/2023 at 3:35 PM