The invention of an improved ship’s compass, of the earth-inductor type, was announced by the U. S. Bureau of Standards. It is said to possess many advantages over the usual magnetic type of ship’s ...

National Air and Space Museum Technical Reference Files: Equipment / Series M7: Equipment: Avionics, Electronics, and Instruments, by Manufacturer / Pioneer The majority of the Archives Department's ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. 3-D: 11.4 × 8.3 × 8.3cm (4 1/2 × 3 ...