306 



GEOLOGY OF THE COMSTOCK LODE. 



and a,, a.,, ^gare the intercepts of the component hnes on the axis of ordi- 

 nates. Tliis finally leads to 



^/ rr 2 - < «! ( 1 — cos m n^ — fi^ (cos m— -\- cos w — + 2 cos mir^ \ sin m u, 

 TT u m ( 4 4 2 S 



an equation which, though linear with respect to a.^ and ft and capable of 

 further simplification, cannot be j^ractically utilized. 



In view of this fact, it was decided to calculate the constants a^ and ft 

 for each set of observations separately. Tables XI., XII., and XIII. give 

 the results, these tables corresponding to III., VI., and VIII., respectively. 



Table XI, 



a =+0.064; 



|3= -0. 000082 ± O.000007. 



Table XII. 



<l= + 0.096; 



P=-0. 000271 ± 0.000013. 



