C 2 57 ] 
At Nertfchia, from 20 Days? Feet Toifes Inches^ 
Obfervations ill June , J 2 5 »”ob 
The Height above the Sea 1738 or 298 — 
At the Silver-Mines at Argun") 
9 Days in July, — J 25730 
The Height above the Sea 2121 or 35:37 
Our Author adds feveral judicious Reflexions up- 
on the Time and Manner of making thefe Obferva- 
tious, in order to determine any thing with Cer- 
tainty ; which he has endeavour'd to keep ftriXly to 
in thefe Experiments ; and concludes, that the Plains 
in fome Parts beyond the Lake Baical, are almoft 
as high as the Tops of high Mountains in fome 
other Countries ; Mount Majjane , according to the 
French Geometricians, being but about 408 Toifes 
high 5 which differs but little from the plain Coun- 
try at Kiachta j which yet has conflderable Moun- 
tains rifing in its Neighbourhood. 
From whence our Author concludes, that the 
Elevation of the Earth, in this Trad, above the Le- 
vel of the Sea, is very great, compared with the Weft 
Part of Sibiria and Europe. * 
The 
* M. De la Condam’ine , in his Voyage thro’ the inland Part of 
South America , makes Quito to be between 14 and 1500 Toifes 
above the Level of the Sea. Suppofe ■■ 1 450 
He tells us, that Pichincha is 750 higher — 750 
This makes in the Whole — - - — 2200 Toif. 
above the Level of the Sea. 
P. Martel , Engineer, in his Account of the Glacieres in Savoy , 
printed at London 1742, tells us, that the Barometer at Geneva, by 
the Side of the Rhone, flood at 27 ~ I. which is 656 Feet above the 
Level of the Sea according to Schenzer j and that the higheft Point 
of 
