376: Piyfical Objections 
Klein, very much employed. Refpecting this kind ‘of tated 
der, the experiments of Profeffor Gmelin give the following’ 
refult: one part of bifmuth, 2 parts of tin, and 1 part’ of 
lead, melt in boiling water. According to Klein, ‘the tin- 
men employ for foldering, a mixture of 1 part of bifmuth, 
24 parts of tin, and 4 parts of lead. Eight parts of bif- 
muth, 3 of tin and 5 of lead, gave a metal exceedingly hke 
tin in its colour and brightnefs, but very brittle; im water 
beginning to boil, it became not only foft, but was com- 
pletely fufed. This imitation, however, may be better ac- 
complifhed by the mixture of Profeffor Lichtenberg, which 
confifts of 5 parts of bifmuth, 3 of tin and 2 of lead. This 
metal is very like the former, though not fo brittle; but it 
feemed to melt in hot water even before it came to boil. 
VI. Phyfical Obfervations om the Eaft or Baltic Sea. By 
F. W.Orro. From Abrifs einer Naturgefchichte des 
Meeres... Berlin 1792 and 1794. 2 Vols. 8vo. 
Tu E. Baltic is a real mediterranean fea, and nota lake, 
as M. de Buffon endeavours to fhew, in his general work on 
natural hiftory. It is every where furrounded by the land, 
except where it is connected w vith the North Sea by three 
narrow paflages, the Sound *, and the large and Jefler Belt. 
At 
* The paflage through the Sound is now of lefs importance fince the 
conftruétiow of the Holftein canal, which joins the Baltic to the German 
Ocean. The idea of this junétion was conceived under Frederic IV. 
Duke of Schlefwig Holftein, but was not undertaken till the Ruffian go- 
vernment agreed to co-operate in promoting its fuccefs. It was begun in 
he {pring of the year 1777, and was carried on by contraétors, who en- 
gaged, for a certain yearly fum, to “complete a certain portion of it. 
This canal, the whole length of which, from Kieler-Ford to Rendfburg, 
is €qual to 16,650 poles, of fixteen feet each, proceeds on a level with the 
Baltic to the firft lock at Holtenach, where it rifes eight feet fix inches, 
Jr then proceeds to the fecond Jock at Knop, 745 poles diftant from Kie~ 
ler-Ford, which has a rife of eight feet fix inches, and then continues to ~ 
—T. near 
