458. Scientific Intelligence. [Dec. 



however, has given a co-efficient depending on the latitude of 

 the place. The correction of B thence resulting is contained in 

 the following table. 



This table is copied from Bodi's Fahrbuck for 1817, where 

 Prof. Gauss has published barometrical tables of nearly the 

 same form as the above. 



Example. — Barometer, lower station 30-292 



upper station 29*450 



*+ t> 



Thermometer attached, lower station 



upper station 

 detached, the same. 

 Lat. 45° 30'. 



= 5i 

 9' =6 



24 



Log. 30292 = 3-48133 

 Log. 29-45 = 3-46909 



0-01224 

 -27 



119" 



Log. 11-97 = 3-07809 

 B = 9-75428 



Cor. of B -2 



2-83235 = log. 679-7 English feet. 

 I remain, Sir, your obedient servant, 



J. L. TlARKS. 



