"The Chemist's Duplex Slide Rule"
by: Dr. R Harmon Ashley
Copyright 1923
- Title page, slide rule illustration
- Theory --------------------------------------------------------------------------------- pages 1-5
- Description of The Slide Rule ---------------------------------------------------------- pages 5-9
- The Inverted Slide Rule ---------------------------------------------------------------- pages 10-11
- Combined Regular And Inverted Scales ------------------------------------------------ pages 11-17
- The Chemist's Duplex Slide Rule ------------------------------------------------------- pages 17-25
This manual is from the collection of Clark McCoy