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Special pages :
Ludwig Darmstaedter. Handbook On the History of the Natural Sciences and Technique. Berlin, 1908, 2nd edition
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Source: Lenin Collected Works, 4th Edition, Moscow, 1976, Volume 38, p. 333
Publisher: Progress Publishers
First Published: 1930 in Lenin Miscellany XII. Published according to the manuscript
Publisher: Progress Publishers
First Published: 1930 in Lenin Miscellany XII. Published according to the manuscript
LUDWIG DARMSTAEDTER.
HANDBOOK ON THE HISTORY
OF THE NATURAL SCIENCES
AND TECHINIQUE
BERLIN, 1908, 2nd EDITION
(Lesesaal in der Landesbibliothek)
Determination of the velocity of light:
| 1676: | Olaf Römer (from the
eclipse of Jupiter): 40,000 geographical miles (less than.... (less than.... | 300,000) km. per sec. 298,000 km.) |
| 1849: | Fizeau (toothed wheel
and mirror): 42,219 geo- graphical miles . . . . . . . . . . . . | = 313,000 km. per sec. |
| 1854: | Foucault (2 revolving
mirrors, etc.): 40,160 geo- graphical miles . . . . . . . . . . . . | = 298,000 ” ” ” |
| 1874: | Alfred Cornu (à la
Fizeau) . . . . . . . . . . . . . . . . . . | 300,400 ” ” ”
300,300 ” ” ” |
| 1902: | Perrotin (idem) . . . . . . . . . . . . | 299,900 (±80 m.) ” |