HIMALAYAS ON THE PLUMB-LINE IN INDIA. 
77 
These will take in the whole Enclosed Space, both Known and Doubtful Regions. In 
like manner for the other stations : — 
At B, lune I., width /3= 8 °, azimuth of middle line =19° west. 
At B, lune II., width /3=30°, azimuth of middle line = 0 °. 
At B, lune III., width /3=30°, azimuth of middle line =30° east. 
At B, lune IV., width /3=30°, azimuth of middle line =60° east. 
At B, lune V., width j3=10°, azimuth of middle line =80° east. 
At C, lune I., width (3=30°, azimuth of middle line = 0 °. 
At C, lune II., width (3=30°, azimuth of middle line =30°. 
At C, lune III., width 13=20°, azimuth of middle line =55° east. 
40. By spherical trigonometry and an examination of the maps the following 
results have been obtained, from which it will be seen which of the quantities 
^2 •••• in the several lunes fall within the Enclosed Space (and therefore have any 
sensible effect), and which in the surrounding low country. 
Station A. 
In lune I., from to A 20 occur in Known Region, from A 20 to ^ 3 , in Doubtful Region. 
In lune II., from to occur in Known Region, from A 21 to A 35 in Doubtful Region. 
In lune III., from to A 20 occur in Known Region, from A 21 to A 37 in Doubtful Region. 
In lune IV., from to A 20 occur in Known Region, from A 21 to in Doubtful Region. 
In lune V., from to A 20 occur in Known Region, from h^i to A 34 in Doubtful Region. 
Station B. 
In lune I., only A 27 occurs in Known Region, from to A 34 in Doubtful Region. 
In lune II., from to occur in Known Region, from to in Doubtful Region. 
In lune III., from to A 26 occur in Known Region, from h^y to A 39 in Doubtful Region. 
In lune IV., none occur in Known Region, from to A 39 in Doubtful Region. 
In lune V., none occur in Known Region, from A 32 to h^y in Doubtful Region. 
Station C. 
In lune I., from to A 33 occur in Known Region, from A 34 to in Doubtful Region. 
In lune II., none occur in Known Region, from A 32 to ^40 in Doubtful Region. 
In lune III., none occur in Known Region, from A 33 to h^s in Doubtful Region. 
41. The following is the method I have pursued to determine the heights of the 
masses standing on the successive compartments which fall within the Known and 
Doubtful Regions. For the Known Region, I marked out the lunes and their middle 
lines upon the Survey Maps, and such others as I could procure for regions beyond 
them, by stretching threads upon them ; and for the Doubtful Region I used my own 
diagram, fig. 5, where maps were not available. I then marked on a slip of paper 
for each map or diagram, according to the scale of each, the distances from the 
MDCCCLV. M 
