Originally Posted by boydak
+1 on dumping it.
I know the beer is never ruined but glass and other stuff in teh wort would have made me too nervous also.
Glass does not float no matter how small the particle is. It is much denser than water or fermented out beer and will sink to the bottom.
Silica glass is 2.2x more dense than water. I can only assume that the thermometers are made from silica glass.
I wouldn't have dumped it.