216 FOEESTKY WOEK 



NUMBER OF WIRE NAILS PER FOUNT). 



DRAINING NOTES. 



NOTES BE DRAINING TILES. 



y^j-ea of circle 



Circumference 



Diameter x -8862 . 

 Diameter x -7071 

 Radius x 6-28318 



square of diameter x -7854. 

 diameter x 3-14159. 

 side of an equal square, 

 side of an inscribed square, 

 circumference. 



i tol 

 i » 1 

 1 „ 1 



H „ 1 

 1* „ 1 



ANGLES OF SLOPES 



63° 30' 

 53° 

 45° 



38° 40' 

 33° 42' 



If tol 



29° 44' 

 26° 35' 

 18° 25' 

 14° 12' 



NATURAL SLOPES OF EARTH WITH HORIZONTAL 

 LINE. 



Rubble 



Clay, well drained 



Clay, v>'et 



Peat, loose 



Peat, firm 



45° 



45° 

 16° 

 15° 



45° 



