Formation of Metallic Copper.—Crystallization.» 149 
that city ; and it was also experienced by another vessel, bound. 
from Brazil to Portugal, at the distance of 120 leagues. 
On the 4th of April 1812, the vessels on the coast of the, 
Caraccas trembled, during the heavy shock of an earthquake,; 
as if they had been on a reef of rocks, _- pe tate asa 
In the earthquake which, took place at Chili,-on the 19th of 
November 1822, the effect on the ships in the. bay was such, 
as if the chain-cable had run out in an instant, ~ 
_ On the 10th of February 1823,° the-East. India Company’s 
ship Winchelsea, in east long. 85° 33", and north lat. 52°, ex- 
perienced the effects of an.earthquake.. - When the vessel was. 
some hundred miles from land, and out of soundings, a tre-. 
mulous motion was felt, as if it were passing over a coral rock, 
and this was accompanied with a loud rumbling: noise, both 
of which continued for two or three minutes. ; 
This effect bears a close, resemblance to that which ‘is de- 
scribed in the following extract ofa letter from. on board the 
Recovery, of » in a voyage from Madeira to Honduras, in 
February 1825. t pte 
otis Gites 
_ Thmaking-ceinent-topper ‘ini ‘Germany, plates of solid cop- 
per are obtained, ind also’ regiiline copper in the fibrous, ca~ 
pillary, dentiférm;”*reniform, ‘and ‘botryoid external shapes ; 
and in'the smelting of sonic sulphurets of copper, fibrous, la- 
mellar, and crystallized pure copper is formed.—Edin. Phil. 
Journ: Tiles : : , x F : viel e 30 : ~ 
|... .., BEFECT OF POSITION ON CRYSTALLIZATION, - 
_:Machman,. professor of chemistry at Christiania, in Nor- 
Ways, in amemoir § On the Effect of the Earth’s Magnetism on 
the Separation of Silver,” states that'in the year 1817, when 
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