1869.] 



ULRICH — ^' NUGGETTT REEF." 



331 



tioned, suceessM in striking the former vein above the granite. 

 Figs. 5, 5a, 5b represent these relations of the " horse," reef, and 

 intrusive vein. 



The third vein of granite was struck in the Alliance Company's 

 engine-shaft at a depth of about 240 feet. Its thickness amounts 



Fig. 5. — Plan of Reef, show- 

 ing Grranite Bar and 

 *' Horse" 



Fig. 5 h. — Cross section of the 

 Reef along line ah of fig. 5 a. 



'^^MW:^'''"nf: 



Fig. 5 a. — Section alo7ig the striJce of the Reef on line ah o/fig. 5. 



>wmtev.^^^i 





h 



to nearly 8 feet ; and it dips both west and south at angles of 35° 

 through the reef. The latter is at this point nearly vertical, and 

 shows, as was the case with the former two veins, no dislocation 



VOL. XXV. PAET I. 2 a 



