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cfd | 20:09 Thu 27th Dec 2007 | Quizzes & Puzzles
5 Answers
What did Christiaan Huygen invent on Chrustmas Day 1687?

Thanks in advance
prev associated with sweetness or light
  
next winter
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Avatar Image joto
Pendulum clock?
20:14 Thu 27th Dec 2007
Avatar Image slark
balance spring..???
20:38 Thu 27th Dec 2007
Avatar Image cfd
Question Author
Many thanks to you both
20:43 Thu 27th Dec 2007
Avatar Image taize
this article says the pendulum clock was invented in 1656

http://stuff.mit.edu/afs/sipb/user/rfrench/mis c/history_math
20:59 Thu 27th Dec 2007
Avatar Image taize
but the pendulum clcok was invented on Christmas Day according to this article .... could the dat in the question be wrong?

http://www.historyworld.net/wrldhis/PlainTextH istories.asp?groupid=2324&*********=ac08

and, this

http://www.timesearch.info/timesearch/default. asp?conid=static_timeline&timelineid=457&page= 2
21:29 Thu 27th Dec 2007

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