Today's collaboration with What is it? blog brings us this strange device: what is it for?
Place your guess in the comment section - no prize this week, you're playing for bragging rights and fun only. For more clues, check out What is it? blog. Good luck!
Update 5/30/08 - the answer is: An automatic bookmark, it's clipped onto the back cover of a book with the pin placed between the pages to mark your place, patent number D163572.Congratulations to Jim A. who got it right first!
Comments (24)
The other compound is Mercury(II) thiocyanate (Hg(SCN)2) AKA "Pharoah's Serpent" It used to be used in fireworks because of its black-snake effect. However, it isn't readily available anymore because it is toxic.