LAWS OF DECREMENT. 381 



\ oblique diagonal : \ horizontal diagonal :: R 

 : tang. \A, :; R : tang. 50 51' 30" :: 1 : 1-2330626 

 :: 17 : 21 very nearly. 



or log. R . . . . = 10- 



log. tang-. 50-57' 30" =: 10-0909851 



0-0909851 



3- axis : \ oblique diagonal :: cos. A 3 : R 

 :: cos. 63 44' 45" : R :: '4423539 : 1 :: 31 : 70 very 

 nearly. 



or log. cos. 63 44' 45" = 9-6457698 

 log. R .... =10- 



- ""0-3542302 



$ axis : \ horizontal diagonal :: cos. \ A 3 : tang. \A , 

 :: cos. 31 52' 22" : tang. 50 37' 30" :: -849227 

 : 1*2330626 :: 11 : 16 nearly, 

 or log. cos. 31 52' 22" = 9-9290216 

 log. tang. 50 57' 30" == 10-0909851 



0-1619635 



\ oblique diagonal : edge :: cos. \ A t : R 

 :: cos. 50 57' 30" : R :: '6298254 : 1 :: 12 : 19 nearly, 

 or log. cos. 50" 57' 30" = 9-7992615 

 log. R . . . . rz 10- 



02007385 



\ horizontal diagonal : edge :: sin. \ A^ : R 

 :: sin. 50 57' 30" : R :: -7766881 : 1 :: 7 : 9 nearly, 

 or log. sin. 50 57' 30" = 9-8902466 

 log.R .... = 10- 



0-1097534 



