SANDCRACK. 



179 



half an inch away from the crack, on each side, cut willi the 

 searcher two gTooves, so that tliey may meet, in the line of tlje 

 fissure, at an angle of about 80° ; thus makinn- a figure more or less 

 in the form of a V. The grooves should be cut, as before directed, 

 through the hard, outer horn, and partly through the soft, white 

 layer. When the proper depth, throughout, has been reached, the 



1^'ifi- 53 



-fJi-dinarv bar shcje. 



triangular portion of horn which has been left between the two 

 grooves and the coronet, will readily " give " to the pressure of the 

 thumb. The previously detailed precautions as to filling up the 

 grooves, oiling the wall, stimulating the coronet, shoeing, and 

 easing off the horn on the ground surface of the wall immediately 

 below the crack, should, here, also be observed. The grooves should 



12* 



