An illustrated manual for the use of the terrestrial and celestial globes (1878)
Schedler, J · New York : E. Steiger · leaf 91
J. TROLL'S TELLURIAN 35 Tellurian and School-Clock combined. … astronomical phenomena can be shown as quickly as instruction in the class-room may require. The clock (of which the above illustration shows the reverse) may be turned on the hinge so as to face the class, and wiU serve as a common school-clock. By means of the bracket with which it is provided,…
Globes · Celestial globes
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
