es along life-size ture work the Carnegie Horizontal Force Instrument Devised by the Ritchie United States Navy Standard Compass leathern manikins, liv- Institution has under con- Department of Terrestrial Magnetism. and Azimntb Circle for Determining the| ing dogs, and even bottles sideration the… … Dip Circle and Total Force Instrument Mounted on Gfmbal Stand for Use on Board Ship,, Showing Manner of Mounting and Details of the Instruments Ship Horizontal Force Instrument Mounted on Tripod for Shore Observations at the The « Galilee " at Anchor in Sitka Harbor, Honolulu Magnetic Observatory,…
Magnetic · Rubber · Automobile · Turbines · Apparatus · Scientific American · Cable · Union Pacific · Thumb nut · Rubber boots · American february · Magnetic work · York city · Driving wheels · Magnetic survey · Sand mold
Internet Archive · Public domain (published before 1931). Free to use for anything.
