Doc. No. 9.] 



91 



ALTITUDES 



Taken by Aneroid Barometer No. 10,811, with the Counties and Localities 

 in which they were taken. 



* A difference of fifty feet by observations of Mr. Atwood with mercurial Barometer, taken three quarters of 

 a mile south ; difference probably in elevation of both places. 



Altitudes were taken in the Counties of Butte, Sierra and upper part 

 of Yuba with another instrument, but as it was found not to correspond 

 with the points of departure on my return, the observations were pre 

 sumed to be incorrect and therefore are not given in this table. Some of 

 the localities in this table have been levelled and their height accurately 

 known, and as the barometric measurements have been found to corres 

 pond, they are probably close approximations. 



