182 Scientific Intelligence. 
spent the gi'eater part of last summer and autumn in the Faroe 
Isles : “ We frequently saw clouds, when precipitated from a 
clear atmosphere by a mountain (as described in Dr MacCul- 
loch’s Western Isles^ voL i. p. 475.) undergo a perpetual in- 
crease at that end from which the wind came, and a correspond- 
ing decrease at the other, sometimes invisibly, and at other times, 
in the form of small clouds. I also occasionally observed that 
those ends of the mountains towards the point from which the 
wind came, were capped with strati^ and the other parts with 
cuv^uli. Sometimes a thin cloud is gradually formed on the side 
of a mountain, and, after a few minutes, disappears as gradually ; 
the whole process, from its first appearance to its final dissolu- 
tion, being performed in not more than twenty or thirty minutes.*” 
22. Aurora Borealis in Faroe and Shetland. — Mr Trevelyan 
observed, that the aurora borealis in Faroe and Shetland was 
often seen very low, not more than 40 or 50 feet above the sea, 
and he learned that in both countries it is frequently heard. In 
Faroe, Mr Trevelyan met one person who stated, that when the 
colour of the aurora borealis is dark red, and extends from west 
to east with violent motion, he had experienced a smell similar 
to that which is perceived when an electric machine is in action. 
23. Great Fall of the Barometer on the %5th December 1821. 
— As there is reason to believe, that the extraordinary fall of the 
barometer on the 25th December 1821 was connected with the 
volcanic eruption of Eyafjeld Jokkul, Iceland, it becomes inte- 
teresting to collect the height of the barometer on that day ii\ 
different parts of Europe ; 
Naes in Iceland, near Reikavig, 
In. lines. 
28.49 Eng. 
Dec. 26. 
Cambridge, 
28.00 do. 
Dec. 25. 
Hanover, 
28.34 do. 
Dec, 25. 1 P. M. 
Altona, „ „ 
28.31 do. 
Dec. 25. 2P' 
Udino, 
25.5.1 French. 
Dec. 25. Morninga 
Bremen, 
26.67A 
Dec. 25. 6^ Storniy. 
St Bernard, 
19.10 
Dec. 24. after Midn^ 
Fougeres, - , 
26.2.4 
Dec. 24. 9** 
Brest, 
26.3 
Dec. 24. 
Lyons, 
25.9 
Dec, 24. 9^ 
Jena, _ . 
26.3 
Dec. 24, 25. 
Treves, „ „ » 
26.6 
Dec. 25. 5‘‘ A. M. 
Augsburg, .p . _ 
25.6.1 
Dec. 25. 3| A. M, 
Teipsic, „ - „ 
26.68 
Dec. 24. 25, 
