Meteorology . 20 1 



Afterwards, two bottles of water were obtained for examina- 

 tion. No. 1. from a snow which, in June, covers larger spaces, 

 and of a fine rose tint. The water of this bottle gave nothing 

 particular. The insoluble residuum in it, treated by alcohol, 

 gave a small portion of a yellow resinous substance ; 25 parts 

 of the residuum gave, 



Silex 14.18 



Per oxide of iron 3.25 



Alumine 1 .75 



Lime 1 



Resinous principle 3.2 



Organic matter 4. 



26.48 

 The increase in weight is attributed to wevter. 



The water, No. 2, when filtered, contained a little carbonic 

 acid and lime, and reddened litmus paper. The residuum was 

 rough, and mixed with small fragments of crystal ; 25 parts 

 gave, 



Silex 1.25 



Per oxide of iron 12.34 



Lime .2 



Organic matter and water 10. 



23.79 



The conclusions are, that the coloured snow of the Alps is 

 reddened in two different ways ; 1. by a greater or less quantity 

 of per oxide of iron spread over its surface. 2. By a vegetable 

 and resinous principle, of a red orange colour, belonging appa- 

 rently to the organization of a cryptogamous plant, of the order 

 of algae, or the lichens. — Bibliotheque Universelle, xii. p. 264. 



4. Coloured Rain. — On the 2d of November, 1819, between 

 2 and 4, p.m., rain fell at Blankenberge, which, for a quarter of 

 an hour, was of a deep red colour, and afterwards what fell 

 gradually resumed its ordinary appearance. This phenomenon 

 drew the attention of Messrs. Meyer and Stoop, chemists;, of 



