The working of astronomical time-service systems by means of accumulators with incandescent lamp rheostat /
Riefler, Sigmund, 1847-1912,
The working of astronomical time-service systems by means of accumulators with incandescent lamp rheostat / by S. Riefler. - 7 pages : illustrations ; 28 cm
Cover title. "First supplement to the treatise Präzisions-Pendeluhren und Zeitdienstanlagen für Sternwarten. Von Dr. S. Riefler ... 1907."
Electronic clocks and watches.
Storage batteries.
Time--Systems and standards.
Astronomical clocks.
Astronomical clocks.
Electronic clocks and watches.
Storage batteries.
Time--Systems and standards.
Time system Germany Astronomical time service Riefler Astronomical precision astronomy pendulum advanced technical
The working of astronomical time-service systems by means of accumulators with incandescent lamp rheostat / by S. Riefler. - 7 pages : illustrations ; 28 cm
Cover title. "First supplement to the treatise Präzisions-Pendeluhren und Zeitdienstanlagen für Sternwarten. Von Dr. S. Riefler ... 1907."
Electronic clocks and watches.
Storage batteries.
Time--Systems and standards.
Astronomical clocks.
Astronomical clocks.
Electronic clocks and watches.
Storage batteries.
Time--Systems and standards.
Time system Germany Astronomical time service Riefler Astronomical precision astronomy pendulum advanced technical