"The Mannheim Slide Rule"

by: William E. Breckenridge

Copyright 1922

This manual appears to the be first work of William Brackenridge for K&E. The style for his later Mannheim manuals is started here. This manual covers the 4041 and 4053 families. The 1924 Mannheim manual is a major edit of this manual and the 1924 Polyphase manual was taken from this text.

This edition is divided into three different sections:

Cover and opening pages:

Answers to Problems:


"The Mannheim & Polyphase Slide Rules" by William E. Breckenridge,

Copyrighted 1922

"The Slide Rule and Plane Trigometery", by J. M. Willard

"The Polyphase Slide Rule"