50.5 MB (1.6 MB compressed)
4961 x 3557 pixels
41.9 x 30.2 cm ⏐ 16.5 x 11.9 in (300dpi)
ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Solar measuring machine, 1860. Engraving showing an heliograph instrument being used to measure the total solar eclipse on 18th July 1860.
Model release not required. Property release not required.