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    Re: Confirmation of a story I was told
    From: W F Jones
    Date: 2014 Jan 03, 08:56 -0500

    I've encountered "FireTacks" in some local parks while hiking that are
    retroreflectors (1000+) in a 1 cm square area arrangement.  The tacks
    are easily followed at night to the general area of a geocache.  They
    are frequently about 6-10 feet above ground level and stuck in a tree trunk.
    Rochester, NY
    On 1/2/2014 9:37 PM, Norm Goldblatt wrote:
    > Attached is a photo of a beautiful retroprism I've had for decades. The guy 
    who gave it to me said that it was one of many that framed the edges of a 
    WWII US carrier. They were used to provide visual guide when there were 
    enemies in the sky and blackout called.. The idea is that these retroprisms 
    always reflect light back in the direction from whence it came. A US pilot, 
    with a lamp mounted on his head could see light from all the reflectors, as 
    angle of incidence didn't matter, and the enemy could see nothing as it was 
    unlikely that they had light sources so situated. Fiendishly clever, but 
    true? Anyone ever hear this?  Even if you say it's bunk, I'll still tell the 
    > Norm
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    > Attached File: http://fer3.com/arc/imgx/retroreflector-back.jpg
    > Attached File: http://fer3.com/arc/imgx/retroprism-front.JPG
    > View and reply to this message: http://fer3.com/arc/m2.aspx?i=126139

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