of Metalliferous Veins by Cross-veins, Part II. 259 



Of the 233 intersections particularized in my last commu- 

 nication, 125 are by clayey cross-veins (Jlucans), and 108 by 

 quartzose ones (cross-courses); being 53*7 per cent, by the 

 former, and 46*3 by the latter. 



(a) Of the 125 intersections by Jlucans — percent. 

 Those unaccompanied by heaves are 17*6 



... heaved towards the right-hand 55*2 



left-hand 27'2 



greater angle 70'4< 



smaller angle 12*0 



Of 103 lodes which are heaved by Jlucans — 



The tin lodes are 24*2 



... lodes yielding both tin and copper ores .... 5*8 



... copper lodes 70*0 



Of 22 lodes which are intersected by Jlucans without being 

 heaved — 



The tin lodes are 1 3*6 



... lodes yielding both tin and copper ores .... 59*1 



... copper lodes 27*3 



Of 28 tin lodes which are intersected by Jluca?is — 



Those which are heaved are 89*3 



not heaved 10*7 



Of 19 lodes affording both tin and copper ores and inter- 

 sected by Jlucans — 



Those which are heaved are 31 '6 



not heaved 68*4 



Of 78 copper lodes which are intersected by Jlucans — 



Those which are heaved are 92*3 



not heaved 7'7 



feet 

 The mean distance of all the heaves by Jlucans is . . 21'5 

 the heaves of tin lodes .... 19'3 

 lodes yielding both 



tin and copper ores 16*5 



copper lodes . . 22*7 

 The average distance of heaves to the right-hand by Jlu- 

 cans is 24*4- 



left-hand . . . 15'3 

 greater angle . . 21*7 

 smaller angle . . 202 



(b) Of the 108 intersections by cross-courses (quartzose 

 cross-veins) — percent. 

 Those unaccompanied by heaves are 28*7 



... heaved towards the right-hand 44"4« 



left-hand 26*9 



S2 



