282 ' - Aeronauts.—Lectures. . 
times contains hornblende; (2) syenite, which contains La- 
brador felspar and numerous crystals of the gem named 
zircon; (c) porphyry; (d) amygdaloid; (e) basalt; and 
(f ) sand-stone. ? 
~ €€ 10, The transition limestone of Norway is sometimes 
granular foliated, like that which occurs in primitive 
country, and contains much tremolite.”’ 
M.Von Buch found that in the red sandstone of Silesia 
fine beds of coal exist, a fact worthy the attention of En- 
glish coal-miners, who consider it madness to’seek for coal 
in districts composed of red sandstone. The author has 
also ascertained with some probability, that the detached 
masses of granite found in Pomerania, Mecklenburg, and 
Brandenburg, which perplexed M.de Lue and other geo- 
logists so much to account for their present position, bave 
been torn from the northern mountains from Schonen 
through Smoland in Sweden rather than from those of 
Saxony or Silesia. Smoland is desolated by these blocks of 
granite. This inference is strengthened by the circumstance 
of their being found on the small islands in the Baltic, in 
Femoe as well as in Zealand. 
- M. Degen took an aérial flight in Paris on the 15th of 
August. He ascended in a balloon about three in the after- 
noon, from a platform raised on the middle of the Seine, 
between the Bridge of Concord and the Bridge Royal. As- 
sisted by his wings, he moved horizontally from the plat- 
form to the Bridge Royal, when he rose nearly perpendicu= 
Jar to the height of 5400 feet, following the direction of the 
Seine through Paris, lest he should experience any accident, 
and was successful in guiding the balloon by means of his 
Wings against the wind, which was very strong. Through- 
out he evinced much coolness and courage, At six o’clock 
he descended in the plain of St. Maude; at eight he re- 
turned to Paris. 
On the sth of September, Mr. Sadler junior ascended 
from Cheltenham, «and in about an hour and a half after, 
descended at Chadlington near Chipping Norton. 
LECTURES. ; 
Medical and Chemical Lectures. St. George’s Hospital, 
and George Street, Hanover Sgquare.—These Lectures will 
commence as usual the first week of October, viz. on the 
Materia Medica and Practice of Physic in the Morning, 
from Eght till a Quarter afier Nine ; and on Chemistry 
from a Quarter after Nine ull Ten, By George Pearson, 
M.D, 
