Illus., tables, graphs. 12pp., disbound. FROM: Annalen der Physik, vol. 18, Elfte Heft, pp. 128-39. 8vo, modern wrappers. Leipzig, 1905. Good
Doctoral dissertation (abridged) of the great German physicist, founder of quantitative photochemistry. Here he discusses the operation of irradiation, anticipating his pioneer researches in the area of point discharges.