Eclipse equipment, 1875. Spectroscope, heliostat and Janssen apparatus set up in Calcutta, India, ready to measure the total solar eclipse on 16th Apr

---

Eclipse equipment, 1875. Spectroscope, heliostat and Janssen apparatus set up in Calcutta, India, ready to measure the total solar eclipse on 16th April 1875.

---

Size: 4781px × 3673px
Photo credit: © ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 16, 16/04/1875, 16th, 1800s, 1875, 19th, apparatus, april, astronomical, astronomy, black--white, calcutta, century, eclipse, equipment, heliostat, historical, history, india, indian, instrument, janssen, measurement, measuring, monochrome, observation, outdoors, preparatory, prepared, preparing, prism, ready, research, science, set, setting, singer, solar, spectroscope, spectroscopy, sun, technological, technology, telescope, total, view