[ 25 ° 3 
looked upon as Capitals themfelves. The Space 
they mealure is no lei's confiderable. The yaik is 
the firft River of Note on the Weftern Side. It rifes 
under the Latitude of 74, of Longitude 7 8 , and 
runs into the Cafpian in 47 of Latitude, and 74 
of Longitude. The Irtifch rifes in the Country of 
the Kalmucks, Lat. 467, Long. 1035 and empties 
itfclf into the Oby , Lat. < 5 i. Long. 8 6. The Oby 
rifes under 52 Lat. 1037 Long. > and lofes itfelf in 
the Mare glaciale, Lat. 67, Long. 8 6. after running 
a Courfc of near 800 Leagues, and receiving a great 
Number of Rivers of confiderable Note. The Je- 
nifea is not much lets than the Oby. The Se- 
lenga takes its Rife under Lat. 48, Long. 1 14 5 runs 
into the Lake Baical , in f i° 20" Latitude, with 
many others equally confiderable, which it would 
be tedious to mention. 
The Water of thefe Rivers is for the mod part 
frefh, clear, and falubrious : In fome it is a little 
brackifh, by the Mixture of Currents from fait Lakes 
and Springs, which abound in many Places : They 
contain Fifh of various Kinds in great Plenty, and 
moftly of an excellent Flavour. 
The Lake Baical may deferve fome Mention to 
be made of it, being one of the greateft frefh- water 
Lakes yet difeover’d : It extends, according to our 
Author, from the one hundred and firft Degree of 
Longitude, to the one hundred and twenty- feventh, 
being upwards of 500 Leagues in Length, and is 
from twenty-five to eighty Leagues in Breadth. It 
is every-where deep and navigable; the Water is 
extremely clear ; it abounds with great Plenty of 
