106 Mineralogy and Geology of the White Mountains. 



varies ; it ramifies occasionally into several smaller dikes and lines, 

 and in one place, of a few feet square, are eight cut-offs, or disloca- 

 tions, where the small veins terminate abruptly, and commence 

 again forward or laterally, with granite intervening, and vanish in 

 a line or point. The cracks in the granite pass through the dike, 

 and at the same angle, and yet the dike intersects veins in the gran- 

 ite. A hand specimen obtained here, presents a rare intermixture 

 of trap and granite — actually exhibiting five alternations of the 

 two, as if the fingers of one hand were alternately inserted be- 

 tween those of the other, in the same plane. 



Fig. I. 





Fig. 2. 



Another dike runs nearly parallel with this in the field on the 

 west, which a little farther south, beyond the guide-boai"d, may be 

 observed as No. 2, crossing the E. and W. road in two veins, twenty 

 inches apart — eastern one four inches, and western three inches 

 wide — the former containing imbedded fragments of granite, the 

 latter dividing into two branches, that become mere lines. Fig. 1. 



North of this road, in the field, this dike is again uncovered, 

 and appears in two veins fourteen inches apart. The eastern dike 



