The book "Reflections" by M. Walter Maxwell, has a picture of him (second page) holding a slide rule.

http://homepages.ipact.nl/~pa1are/tuner/reflections.pdf

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Dave G KK7SS
Richland, WA

'59 Morris Minor 1000 - working on it..
'65 Sprite - in process :(
'76 Midget - co-owned with #4 Son :)
'06 Honda Civic Hybrid