Invention of the push-pin
See also from travelchannel:
In short – The push-Pin was invented by Edwin Moore while he was a senior at Princeton University in 1899. The patent was approved in 1900 and the Moore Push-Pin Company was born. The original Push-Pin was made of glass and up to 1/3 of the production run would crack within.
HISTORY OF THE MOORE PUSH-PIN COMPANY
http://www.answers.com/topic/thumbtack
Recall the "College of New Jersey" moved to Princeton, New Jersey in 1756 and was renamed "Princeton University" in 1896.
As of this time, the Sunday Morning Website did not have the push pin story.
UPDATE
http://games.yahoo.com/blogs/unplugged/pin-tastic-portrait-sharp-tack-232209461.html
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