[GreenKeys] Sighting

[COURYHOUSE at aol.com]

We have several editions I think Jim of 'The Boy Electrician'  I will  look 
to see what other differences.
 
One other  book all about  radio and TV  had   2  editions one  with 
foxhole  razor blade radio and the other  had    foxhole and then a galena 
detector version. 
 
We have tried collect up as many different you books  on electrify and  
communications... they were all great influences on youth to get them 
interested  and educate them.
 
Ed#  _www.smecc.org_ (http://www.smecc.org) 
 
 
In a message dated 9/10/2016 7:53:50 P.M. US Mountain Standard Time,  
jhhaynes at earthlink.net writes:

Well in  my childhood the public library had a very old edition of the
Boy  Electrician book.  I remember directions for making an  electrolytic
rectifier, what the hams used to call "slop jar" rectifiers,  used before
they had tube rectifiers.  And for making a lead/acid  battery, and for
making a photocell using, as I recall, copper oxide.   A later edition
tells about making a selenium photocell.

But I was  not aware of the Teletype connection until my younger friend
mentioned it  and showed me the book that had been given to him as  a
youngster.
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