274 Accoimi of the Descent of the Glacier of the 
51°. 8, and 53°.6f) corresponding to the parallels of 45° and 47°, 
tend to raise the lines of equal summer or the isotheral curves. 
However great be the influence of the unequal division of the 
heat between the seasons, on the physical condition of nations, on 
the developement of agricultural industry, and the selection 
of plants for culture, I would not recommend the tracing up- 
on the same chart the isothermal lines, and the winter and sum- 
mer curves. This combination would not be more fortunate 
than the lines of declination, inclination, and equal intensity of 
the magnetic forces, which, however, . all depend upon one ano- 
ther. Instead of multiplying the intersection of the curves, it 
will be sufficient to add to the isothermal lines, near their sum- 
mits, the indication of the mean temperatures of summer and 
winter. In this way, by following the line of 50°, we shall find 
( 30° 2\ 
73°*4 / 
(SS)’ (SI)' 
( To he continued.) 
Art. IX. — Accotmt (f the Descent of the Glacier of the Weiss- 
horn, on the ^7 th December 1819, and the Destruction of 
the Village of Randa 
T^HE village of Eanda is situated about six leagues above 
Vispach, on the southern or right branch of the valley of Vis- 
pach, known under the name of the Valley of St Nicholas. 
The valley is about 2400 feet from the right bank of the Visp, 
on the steep declivity of a hill of debris, whose stony soil has 
been converted into meadows by the industry of the inhabitants 
of Randa. Opposite to this hill is another of the same kind, 
above which are the rocks that are covered by the Glacier of 
Randa, whose' highest summit, called the Weisshorn, rises 
about 9000 feet above the village. The width of the valley, at 
* Translated from the Bibliotheqne Universelle, Feb. 1820. p. 150. and taken 
from the official report of M. Venets, Engineer to the Council of State of the YaJf 
lais. 
