A Device for Projecting a Small Spot of Light Suitable for Exploring Photosensitive Areas
Open Access
- 22 January 1915
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 41 (1047), 141-142
- https://doi.org/10.1126/science.41.1047.141