This subject is treated in the article Photometry, Celestial.
The Harvard Photometry of 4260 lucid stars was issued by Professor E.
Si chsischen Gesellschaft der Wissenschaften, two works on celestial photometry (Grundziige einer allgemeinen Photometrie des Himmels, Berlin, 1861, 4to, and Photometrische .Untersuchungen, Leipzig, 1865, 8vo), and a curious book, Ueber die Natur der Cometen (Leipzig, 1872, 3rd ed.
He was elected a fellow of the Royal Society in 1840, and in 1892 was awarded one of the royal medals for his work on photometry and stellar parallax.
He wrote numerous papers on photometry and spectrum analysis in Poggendorff's Annalen and Berichte der k.
The temperature of the sun and of the electric spark, others again with electro-photometry and the chemistry of the electric arc. With Professor J.
The embarrassing subject of photographic photometry has also been attacked by Prof essorPickering.
By adapting to this instrument various ingenious devices he was enabled to employ it in a great variety of investigations, connected especially with photometry, hygroscopy and the temperature of space.