i86 



CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



[P ] = 59 ; log [pvv ] = 6. 2248 



p. e. = zt 0.00020 



A 



[p ] = 56^ ; log [pvv ] = 6.0647 



+ 0.00040 



p. e. = ± 0.00017 



