210 APPENDIX. 



found that large lumps of ice are slightly phosphorescent in a 

 dark room after being exposed to the sun, the temperature being 

 kept several degrees below freezing point. The brothers Schlagint- 

 weit, Prof. Berty, and Mr. Tuckett, have witnessed the phos- 

 phorescence of the snow and the ice on the glaciers of the Alps, 

 etc. The darker the night, the more brilliant the phenomenon. 

 It appears sometimes like the effect of a second sunset. This 

 phosphorescence is remarked on the Alpine summits and on the 

 snow which lies in the valleys of Piedmont, Switzerland, Valais, 

 etc. The colour of the light emitted is bluish. It is not re- 

 marked in snow which has fallen shortly before night, and which, 

 consequently, has not been long exposed to the sun. 



THE END. 



JOHN EDWARD TAYLOR, PRINTER, 

 LITTLK QUEEN STREET, LINCOLN'S INN FIELDS. 



