2AZ Scientific Intelligence. (Marcu, 
the freezing temperature. I consider this fact as scarcly less strik- 
ing than Count Rumford’s experiments on the heat evolved by fric- 
tion at Munich, 
XIII. St. Helena. 
The late Dr. Roxbourgh while at St. Helena, where he spent 
several months, drew up a flora of that island. He found in it 56 
species, 50 of which were peculiar to the island, having been ob- 
served no where else. Not a single new genus occurred. 
XIV. Prizes of the French Institute. 
The prize for the best set of physical experiments during the 
course of 1815 was divided between M. Seebeck and Dr. Brewster. 
The prize for the mathematical theory of the vibrations of elastic 
surfaces, and the comparison of them with exper:ment, was given 
to Mademoiselle Sophie Germain, of Paris. 
The prize for the theory of waves at the surface of a gravitating 
fluid of an indefinite depth, was given to M. Augustin Louis 
Cauchy, Ingeneur des Ponts-et-Chaussées. 
Lalande’s medal was voted to M. Mathieu, an astronomer at- 
tached to the Royal Observatory of Paris. 
XV. Cinnamon Slone. 
Specimens of the rock containing the ciunamon stone of Werner 
have been brought to London from Ceylon. It consists of three 
constituents: namely, schalstone, quartz, and cinnamon stone. 
Tlie schalstone constitutes the principal ingredient, and has the 
usual imperfectly foliated appearance, and all the characters which 
distinguish the variety of it found in the Bannat of Temeswar. The 
quartz is distributed irregularly, and has no appearance of crystalli- 
zation. The cinnamon stone is in grains, none of which exhibit 
any traces of a crystalline form. I observed one of the grains, in- 
deed, which bore some resemblance to the garnet dedahedron ; but 
the apparent faces were conchoidal, and therefore not natural ones, 
In some places the schalstone seemed to be impregnated with cin- 
namon stone; for it had the colour of cinnamon stone with the 
foliated texture of schalstone. 
» The rock containing schalstone, which occurs in the Bannat, is 
likewise a triple compound, consisting of an aggregate of crystallized 
garnet, blue calcareous spar and schalstone. Hence it bears a re- 
semblance to the Ceylon rock; for the cinnamon stone obviously 
belongs to the garnet family. The great difference between the 
two consists in the one containing quartz in place of the blue calca- 
Teous spar, which constitutes the ingredient in the other. 
XVI. Rocks in Lake Huron. 
In lake Huron in North America small islands occur, distin- 
guished by the name of the flower-pot rocks, from their figure. 
The structure of these rocks, if it be correct, deserves the attention 
ef mineralogists. They consist of three beds; the lowest bed is 
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