r208 APPENDIX. 



M ABCHAND. " On the Phosphorescence of Phosphorus :" Journ. 

 fur Prakt. Chemie, 1851, 1. p. 1. We have here a set of 

 experiments, tending to show that the phosphorescence of 

 phosphorus is not owing to combustion, but to a molecular 

 action upon the surface of this substance, and which mani- 

 fests itself in all kinds of gases, whether they support com- 

 bustion or not. But the phosphorescence does not appear to 

 be of long duration in gases, such as carbonic acid and hy- 

 drogen, and moreover depends upon the pressure to which the 

 gases are submitted. Marchand thinks that phosphorus is ca- 

 pable of shining in the dark in carbonic acid, hydrogen, etc., 

 and that the phenomenon is owing to the volatilization going 

 on at the surface of the phosphorus. 



SCHEOETTEE. In 1852, Professor Schroetter of Vienna, after 

 assuring himself by several experiments that the light given 

 out by Phosphorus, when its temperature is slightly raised, is 

 owing to oxidation, showed that Sulphur, Selenium, Tellurium, 

 and Arsenic, heated gradually in contact with oxidizing bo- 

 dies, give out light and produce oxides which differ from those 

 produced by ordinary combustion at higher temperatures. Le 

 Cosmos, vol. i. (Paris, 1852.) 



EHRENBEEG-. Ueber das LeucUen des Meeres. Abhand. der 

 AJcad. zu Berlin, 1854. 



DE QTJATREFAGES. On the Phosphorescence of Noctiluca : 

 Comptes-Rendus, t. xxxi., andAnnales des Sciences Naturelles, 

 3 e serie, vol. xiv. 



VEEHAEGHE. On the Phosphorescence of the Sea at Ostend. 

 A pamphlet reprinted from the Bulletin de VAcad. des So. de 

 B'ruxelles, 1855. 



EOSE (Heinrich). On the emission of light by Arsenious Acid 

 whilst crystallizing : Ann. der PhysiJc, 1835, and Ann. de 

 Chim., 2 e serie, Ixi. 288. Light developed during the crystal- 

 lization of sulphate of soda and potash : Ann. de Chim., 3e 

 serie, Iv. 125. On the phosphorescence of certain substances 

 when heated : Annales der PhysiJc, March, 1858, and Ann. 

 de Chim., January, 1859. 



