The conservation of the Drexel Collection's David Rittenhouse astronomical musical clock /
by Bruce Ross Forman.
- 11 pages : color illustrations, 22 cm
Rittenhouse, David, 1732-1796.
Astronomical clocks--Conservation and restoration. Musical clock--Conservation and restoration.
Floor clock USA Rittenhouse Drexel 1770 specific clock Drexel University Forman, Bruce Ross Restore