Page:EB1911 - Volume 18.djvu/428

Rh {| 59.—GREENOUGH’S BINOCULAR MICROSCOPE (ZEISS). 61.—PETROGRAPHICAL MICROSCOPE (ZEISS).
 * EB1911 - Microscope - Fig. 59.png
 * EB1911 - Microscope - Fig. 61.png
 * EB1911 - Microscope - Fig. 61.png
 * EB1911 - Microscope - Fig. 61.png
 * EB1911 - Microscope - Fig. 61.png
 * }