APPENDIX. 203 
Puirson. “Sur une espéce particuli¢re de mucilage animale :” 
Journ. de Médecine et de Pharin. de Bruxelles, 1855.—De la 
Phosphorescence en général et des Insectes phosphoriques. 
Bruxelles and Paris, 1858. Abridg. ed. i German, published 
at Berlin, 1858, by Dr. Miiller—On some new cases of Phos- 
phorescence by Heat, in Conptes-Rendus de l Acad. des Sc. de 
Paris, February, 1860.— Recherches nouvelles sur le Phosphore. 
Brussels, 1856.—La Force Catalytique, Etudes sur les Phéno- 
menes de Contact. Mémoire couronné par la Société Hollan- 
daise des Sciences, Harlem. 1858.— Sur la Matiére Phospho- 
rescente dela Raie: Comptes-Rendus, 1860. 
Nigprce DE Sr. Victor. Onanew Action of Light. Many papers 
in Comptes-Rendus de ? Acad. des Sc. Paris, from 1857 to 
1858. 
Becqueret (Edmond). On Phosphorescence after Insolation : 
Ann. de Chim., January, 1859, and some papers on the same 
subject in Comptes-Rendus since the date just given.—On the 
Phosphoreszence of Gases : Comptes-Rendus del? Acad. des Se. 
Paris, 1859. 
Wartmann. Ona Luminous Fog at Geneva: Comptes-Rendus, 
December, 1859. 
The names of other authors have been given in the present 
work. 
Note.—It has been observed that Calamine (hydrated silicate 
of zine), when heated, becomes electric and phosphorescent at the © 
same time; and this will doubtless be found to be the case 
with many other mineral substances which exhibit phosphores- 
cence. 
The mineral called Wollastonite (silicate of lime) becomes 
phosphorescent by friction. 
My attention has lately been called to the fact that zee and 
snow are phosphorescent after insolation. Although I have 
not had an opportunity of witnessing it myself, I find that 
Placidus Heinrich was acquainted with the phenomenon; he 
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