124 MK. E. W. BINNEY ON A MINERAL VEIN, ETC. 



and N.W. dislocation causing the fissure at right angles to it, 

 and the antichnal axis was then made. Into this fissure the 

 barytes was injected, and the rock forming the sides subjected 

 to great heat. The mass of the rock having been heated 

 nearly to a state of fusion, would gradually radiate its heat 

 from the upper surface, and thus produce lines of ver- 

 tical cleavage at right angles to the cooling surface, such as 

 have been previously described. 



