Das Nickelstahl-Compensationspendel, D.R.P. no. 100870 /

Riefler, Sigmund, 1847-1912,

Das Nickelstahl-Compensationspendel, D.R.P. no. 100870 / von S. Riefler. - 12 pages : illustrations ; 24 cm

96199082


Pendulum--History.

Clock (general) Germany Compensation pendulum Riefler nickel Performance clock pendulum Pendulum science