Charts. Terrestrial magnetism. Horizontal intensity of the earth's magnetic force for 1930, expressed in centimeter-gram-second units; chart 1701. Scale 10° long.= 1.2 in.
Publication Title:
Terrestrial magnetism. Horizontal intensity of the earth's magnetic force for 1930, expressed in centimeter-gram-second units; chart 1701. Scale 10° long.= 1.2 in.
Display Title:
Charts. Terrestrial magnetism. Horizontal intensity of the earth's magnetic force for 1930, expressed in centimeter-gram-second units; chart 1701. Scale 10° long.= 1.2 in.
Corporate Agency Authors:
Hydrographic Office, Navigation Bureau, and Navy Department