[GreenKeys] For all the machinists out there...

[Til128 at aol.com]

And of course there is a Teletype Picture of it also - see attached.
 
TT
 
 
In a message dated 11/15/2016 4:53:02 P.M. Eastern Standard Time,  
1oldlens1 at ix.netcom.com writes:

I don't remember where I first saw this, perhaps in a book on  
optical illusions. It would be interesting to know its history. It may  
be one of M.C.Escher's pictures. A google search produced lot of  
illusory  constructions:
https://www.google.com/search?q=optical+illusions+impossible+constructions&c
lient=ubuntu&hs=pf8&channel=fs&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjI
_6jb3qvQAhWBaSYKHW8xC6IQsAQIIw&biw=1366&bih=628

Also see: https://en.wikipedia.org/wiki/Impossible_trident

On  11/15/2016 6:58 AM, Dave Horsfall wrote:
> I haven't seen this pic for  over 40 years...  One of our school
> assignments was to draw it,  but thankfully we didn't have to make it :-)
>
>  http://www.moillusions.com/instructions-from-hell/
>

--  
Richard  Knoppow
1oldlens1 at ix.netcom.com
WB6KBL
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