A DICTIONARY 



OF THE EXACT SCIENCES, BIOGEAPHICAT .AND LITERARY 



BY 



J. C. POGGENDORFF. 



CONTINUED A X D COMPLETED. 



A period of nearly twenty years has elapsed since the time when Pbggen- 

 dorffs biographical and literary dictionary of the exact sciences appeared. That 

 work attracted the notice of the whole scientific world and gained universal 

 acknowledgment for the care with which the abundant matter, represented in the 

 scientific publications of all ages and of all nations, was therein collected and 

 supplemented by reliable biographical notes. 



A new generation of savants having since then sprung up, the former 

 workers meanwhile still continuing their labours, it has become a work of ne- 

 cessity to issue a supplement in continuation and completion of this important 

 work. This difficult task has been undertaken by the undersigned. 



Hi; has in his possession the material collected for the purpose by the 

 [ate Poggendorff (t 24 th Jan. 1877), the editor of the „Annalen der Physik und 

 Cheniie" during more than half a century, as well as a large accumulation of 

 literary and biographical notes of his own. But he like his predecessor cannot 

 for all that dispense with the assistance of all living authors whose names should 

 appear in the work if the reliability and completeness aimed at is to be obtained. 



He will therefore, when occasion requires during the course of his labours, 

 take the liberty of submitting certain questions to his colleagues and begs of 

 them to have the kindness to return the papers with the answers filled in to 

 the address given below. 



The compiler need hardly say, that all communications respecting the life 

 and works of deceased scientific authors will be received by him most gratefully, 

 as well as all notices, even the most trifling ones, that may seem likely to com- 

 plete or improve the main work. 



Leipzig, 1880. 

 Cnrollnenstr, 6. 

 (Germany) 



W. Feddersen, Dr. phil. 



Specimen- column of the main work. 



Fouoault, Joan Bernard Leon. — 

 SoliB eines Buchhandlers in Paris; seit 1845 

 Redaoteur d, wissenschaftl. Theils des Jour- 

 nal des Dobats (Que'rard, Lit. franc.) (H6- 

 for, N. biogr. gen.) (Or.), 



gob. 1819, Sept. 18, Paris. 



Mit Bclfloldt -i,pfi>rro: Do la preparation de la 

 couohfl sensible qui doit recevoir l'image de 

 la chambre noire (Ann. chim. phys. Ser. HI, 

 T. IX. 1st;!). Prcvdo qui permet de repro- 

 cnure aveo une 6gale perfection dans une image 

 Piifrni-monno los tons lirillants et les tons ob- 

 seurs du modele (lb. XIX. 1847). Mit Fizeau: 

 am 1 mtonsitd de la lumiere emise pai' le char- 



Specimen- column] of the continuation. 



Foucault, Jean Bern. Leon. — Seit 

 1862 Astronom beim »Bureau des longi- 

 tudesa & phys. Assist, am Observatorium zu 

 Paris, Mitgi.d. Paris. Ac. (Cosmos 20) (Compt. 

 rend. 66) (London, R. Soc. Proc. 77). 



t 1868, Pebr. 11, Paris (geb. 18 / 9 19). 

 Perner: Eecueil d. travaux scient., mis en ordre 

 par Gariel, precede d'une notice par Ber- 

 fcrand, 624 p., 4°, Paris, 1878. 

 Ann. chim. phys.: S. la lumiere de Tare vol- 

 taique, 3 p. ( (3) 58, 1860). 

 Compt. rend.: Meth. 1 - c pour mesurer la vitesse 

 de la lumiere dans 1. milieux transpar., 7 p. 

 (SO, 1850). - Emploi d. appareils d'induct. (In- 



over. 



