374 WILLIAM HERBERT HOBBS 



will be seen by comparing with the table on p. 371. The Skaneateles 

 line is also along one of the most prominent directions of jointing. 

 Of the less strongly indicated directions (Canandaigua line and Flint 

 and Twelve Mile Creeks line, N. i8°-22° E.) no strong indication of 

 control by jointing is observable, though the direction N. 16 E. is 

 that of four observed joints, whereas no other directions between 

 N.-S. and N. 30 E. have more than two representatives among 

 those recorded. 



