Sauzay, A. (Alexandre), 1804-1870 · London, S. Low, son, and Marston · leaf 267
ON OPTICAL GLASSES. 243 may be given it, and by the facility with which it may be procured at any hour of the day, is far preferable to the use of the solar light. "MM. Foucault and Donne first conceived the idea of the photo-electric microscope. … Fig- 59. — PHOTO-ELECTRIC MICROSCOPE. " On a rectangular box of yellow copper is fixed ex- ternally a solar microscope, similar in every respect to that described above. In the interior there are two charcoal rods which do not quite touch, the interval between them R 2
Glass manufacture · Glassware
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
