I like aviator styled watches. Some of them have a a dial on the outside that can be used to compute speed/fuel supply/Oil pressure, but I have never learned how to use these functions myself.

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Pickett, Inc., was a slide rule ...

National Museum of American History Wizard Fire Stream Calculator Slide Rule National Museum of American History Acreage Worked Circular Slide Chart by Perrygraf for Allis-Chalmers National Museum of ...