On the Physical Geography of the Alps. 359 
Arr. XXXV.—Review of Researches on the Physical Geogra- 
phy of the Alps, in relation to the phenomena of Glaciers, to 
Geology, Meteorology, and the Geography of Plants ;* by 
Hermann Scuiaeintwerr and Apotew ScuLacintweit.t 
several years. It is divisible into four chief parts:—1. Researches 
on Glaciers; 2. Geological Researches; 3. Meteorological Re- 
Searches; and 4. Researches on Botany and the Geography of 
Plants. ‘ 
The first part gives the researches on the important physical 
phenomena of the great ice-masses of the glaciers in seven chap- 
ters; treating particularly of the characters and properties of ice, 
of the highest portion of glaciers [firn-meer], of the topography 
of the glaciers, their structure, movement, oscillation, and waste. 
n 
relating to botanical researches, the manifold connection of 
_-* WéSetation with climatal conditions is considered ; and the effect 
: Of altitude in limiting vegetation, the periodic phenomena of 
Vegetation, the influence of altitude on the thickness of the an- 
ual rings in coniferous plants, and the peculiar conditions of the 
Vegetation of the Upper Alps, in the Upper Moll district, are com- 
ptised in four chapters. . — 
_ Among the numerons points of interest offered to the geologist 
in the chapters above enumerated, the glaciers, their formation, — 
slace. ‘The memoirt on the 
’ 
Motion, and effects, have a high pl é 
Physical Characters of Ice, by M. Hermann Schlagintweit, (pp. 
1~25,) shows that :—1. in their crystalline structure, glacier- and 
Water-ice, under the alternate influence of heat and cold, resolve 
themselves into quite identical forms:—2. the air-babbles enclosed 
in the ice especially participate in the formation of the crystals, 
and exert an influence on the form of all free surfaces :—3. the 
* Unt tox die physikalische Geographie der Alpen, u.s. w. Leipsic. 
ply i hee Se ‘G Bsccraphic plates and maps. 
mper. 8vo, pp. 600, With Barbie Sat hye 
- From t four. Gi ny Wy ate 
yer riginaliy oe Poggendorft’s Annal, Physik. u. Chem. 
