"The Polyphase Duplex"
"Pocket Slide Rule"
This is a short preview of the manual for identification purposes. Complete scans will be provided when time is available. If someone has a particular need to view the entire version of this manual, please email me and I will put it first in my list to finish. Email address
There are four versions presented here with a 1947 copyright date. The four manuals have different cover, title pages, copyright pages, and slide rule illustration pages. The rest of all four of these manuals is identical between them.
The text of all of the manuals starts on page iv with the "PREFACE"
Doric 10000 & 10002 Plastic Slide Rules T:
Doric K&E Co. 9068 Slide Rule:
Slide Rule Manual No. 4168 Slide Rule:
Slide Rule Manual Polyphase Duplex Pocket Slide Rule Manual No. 68 2059:
Text of the manual:
These manuals are from the collection of Clark McCoy
The 68 2059 was a gracious donation from Jim Clark
The scans of these manuals were provided by Clark McCoy
This web page was produced by Clark McCoy