208 APPENDIX. 
MarcHanp. “On the Phosphorescence of Phosphorus :” Journ. 
Sir 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. 
ScHROETTER. 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.) 
EHRENBERG. Ueber das Leuchten des Meeres. Abhand. der 
Akad. zu Berlin, 1854. 
Dr QuATREFAGES. On the Phosphorescence of Noctiluca : 
Comptes-Rendus, t. xxxi., and Annales des Sciences Naturelles, 
3° série, vol. xiv. 
VERHAEGHE. On the Phosphorescence of the Sea at Ostend. 
A pamphlet reprinted from the Bulletin de? Acad. des Se. de 
Bruxelles, 1855. 
Rose (Heinrich). On the emission of light by Arsenious Acid 
whilst crystallizing: Ann. der Physik, 1835, and Ann. de 
Chim., 2° série, Ixi. 288. Light developed during the crystal- 
lization of sulphate of soda and potash: Ann. de Chim., 3° 
série, lv. 125. On the phosphorescence of certain substances 
when heated: Annales der Physik, March, 1858, and Ann. 
de Chim., January, 1859. 
