"The Log Log Duplex Vector"
This is a supplement for the 4081-3 manual to make it usable for the 4083 Vector slide rule. There were three editions of this supplement. The text of the body of the manuals are identical. The only difference is the cover and the front material. For this reason I have included the front materials for all three manuals and the text from the 1939 edition.
The bookmarks in the following PDF file will help you navigate it.
The Log Log Duplex Vector Slide Rule Supplement
These manuals are from the collection of Clark McCoy