326 A DESCRIPTION OF 



By Plane Trigonometry. 



The Base AB giving 426 {ttt % seven inches, say 

 426, 5, the angle B A C is given 29 , 39', the angle 

 BAC is a right one; the sum of the angles in all 

 triangles being equal to two right angles, or 1 80 de- 

 grees, by deducting the sum of the two angles CAB 

 and ABC, from the sum of three angles in the tri- 

 angle ABC, the angle A C B will be found 



C A B = 29. 39 



A B C == 90.— 



180 — 119. 39 = 60. 21 = Angle A C B. 

 Then as the angle A C B is to the side AB, so is 

 the angle C A B to the side C B, or height of the 



Minar. 



LogS.ofACB Log of AB Log.S.cfCAB Log.ofCB 



9,93905 : 62942 :: 9,69434 : 242,5 



+ 2, 62942 



\ 



10,32376 

 -9* 939°S feet - 



2, 3H7 1 = 2 42,5 



The Cuttub Minar is situated about nine mile3 

 bearing S. 16 W. from the Jumma Musjid, that was 

 erected by the Emperor Shaw J eh an in the present 

 city of Delhi, and appears to have been designed for 

 a Minaret to a most stupendous mosque, which never 

 was completed ; a considerable part of the second 

 and corresponding Minaret is to be seen, and many 

 other parts of this intended immense building, parti- 

 cularly 



