How to Use a Slide Rule, Eugene* Dietzgen Co. -1942 owner's and user's manual F*S Singer Featherweight this is just for you

this is just for you

or just enjoy tiny

notably Leica/Leitz projectors

3 Folding Portable Typewriter owner's manual

These lenses were made for the US military during WWII to mount in K-21 Aerial cameras and used in reconnaissance missions

How to Use a Slide Rule, Eugene* Dietzgen Co. -1942 owner's and user's manual F*S Singer Featherweight this is just for youThis is a high quality reprint of the Eugene Dietzgen Co. "How to Use a Slide Rule" manual dated 1942. The Slide Rule is an instrument for facilitating calculations and is an indispensable aid not only to the engineer and scientist with their involved problems, but also to the accountant, statistician, manufacturer, merchant, importer, teacher, student, or anyone who has calculations to solve. This is the complete Eugene Dietzgen Co. manual, note that