How to re-glue a bridge
Instruments- discuss specific features, luthiers, instrument problems & questions
Was the bridge originally glued, or did it simply fall off when string tension was lowered? If it was already glued it could be possible to see on the fingerboard where it was previously, based on color difference/glue residue.
Irene makes a very important point though. Its also been my experience that placing the bridge improperly is somewhat common, so be very careful that you find the absolute best spot for it before gluing, or maybe just see how it sounds unglued. It might be good!
A fixed bridge can be very convenient though.In the dulcimer group I used to play in, pretty much every time I tuned up a dulcimer I'd check the octave and I'd say over 20 cents off was the standard. Their problem, though, was that they had floating bridges and werent being careful while restringing. A little bump here and there can destroy intonation pretty fast.
A fixed bridge can be nice if you know exactly where you want it to be, but be careful, or you could end up making another one of the dulcimers irene describe. Especially, be careful if you do end up using a book or rock or something makeshift to clamp it while the glue dries. The smallest little shift to the bridge caused by applying the pressure at an angle could move the bridge slightly and could make a big difference in the intonation, and you wont know til the glue dries!
Nate