How to Use a Slide Rule, Eugene* Dietzgen Co. -1942 owner's and user's manual F*S Singer Featherweight notably Leica/Leitz projectors

notably Leica/Leitz projectors

The tuner has a soft and precise rotary vernier tuning

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3 Folding Portable Typewriter owner's manual

How to Use a Slide Rule, Eugene* Dietzgen Co. -1942 owner's and user's manual F*S Singer Featherweight notably Leica/Leitz projectorsThis 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