a level 



MEASUREMENT 

 with the top of the 



151 

 pole. Note 



-v 



the height of die tire, D the top of 

 pole 5 feet from the ground, b the 



B 



3 feet in front at D, 

 DC-.Dc. Assnme that DC the distance of the 

 eye from the tree, if 30 feet and be 



= 8x ** = 30. and CA is 



equal to the height at D: therefore BA = 

 90 + 5 = 35; or fi^ may be found by taking an 



