Angle sin-^ 



PROBLEMS 

 Ad sin i 



259 



^c Vl - cos2 i cos^ d 



Referring to figures: 



Case 1. — Here it will be seen by Figs. 172 and 173 that 



b ^ a + ^ 



therefore 



5 = sin 5i 4- sin i /gyx 



Vl — cos^ i cos^ B 



Case 2. — Here the full dip is obtained by 5 = /3 — a 

 (Case 2, Plate XV) 



DIPPERS 



Case 2. <f- ff-oc 



Cose 3. <f=l8Q°-[i-oc 



Cass 4: <f=oc-p 



Plate XV. — One- 



RISERS 



Case 2 cf=p-ix 



Case 3 d^l80°-p-<x. 



Case 4- d'= a.- ji 

 borehole problems. 



