What is the origin of this word, referring to a man's shaving kit? How is it spelled?

our old friend Michael Quinion at World Wide Words provides this A:

A. I am indebted to the American Dialect Society Web archive, and in particular to
Jim Rader, for the answer to this question, which otherwise I couldn't find in any of
my reference books. The word Dopp is a registered trade mark of a man's toiletry
kit. It was designed by Jerome Harris for his uncle Charles Doppelt, a German
immigrant to Chicago in the early 1900s. So it's presumably an abbreviated form of
Mr Doppelt's family name. The word became widely known during the Second
World War when GIs were issued Dopp kits. The company was purchased by
Samsonite in the early seventies.

What is even less well known is if a soldier had two of these kits, the one that traveled with him while the other stayed at the base was the Doppelgänger.

eerfeerf, I have to ask--does your name mean that you want your freedom back? Or maybe you like to freeze people out?
Just kidding! Glad you're here!

Presumably someone who uses a Dopp is a Doppler, so the Doppler effect is, in fact, a clean shave?


Who says that science is difficult, eh?

the Doppler effect is, in fact, a clean shave?

Well, the Doppler effect has warned me of a few
close shaves.

so the Doppler effect is, in fact, a clean shave?

wouldn't the Doppler effect be the sound of two clean shaven men passing by each other at a high rate of speed?

and what is the opposite of a clean shave?

A dirty shave ??

two clean shaven men passing by each other

Surely it would be one blue-stubbled man being left trailing by a red-hot shaving kit?

We’re back to maths school again!

http:// http://www.ncsa.uiuc.edu/Cyberia/Bima/doppler.html

http:// http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Doppler.html