a? a ad 4 4 
A ing! Vea corrected corrected 
80—81 265° 1470 | — 58959 — 167 | — 49582 | + 1589 
81—82 256 1225 — 59875 — 438  — 50360 | + 1388 
82—83 280 3400 — 62503 — 88 | — 52560 | + 1759 
83 Raghama | 
83—84 288 7024 — 67779 + 1385 | — 56952 | + 3152 
84—85 209 5866 — 71869 + 3435 | — 60332 | + 4995 — 
85—86 290 1233  — 72785 | + 3725 | — 61094 | + 5266 
86—87 289 4440 — 76103 + 4716 | — 63855 | + 6197 
87—88 284 460 — 76455 + 4788 .— 64149 | + 6268 
88—89 287 366 | — 76731 -+ 4860 | — 64378 | + 6337 
89—90 293 780 — 77300 + 5074 | — 64850 | + 6533 
90—91 281 424 | — 71627 + 5124 | — 65124 | + 6585 
91—92 285 583 — 78071 + 5223 | — 65495 | + 6681 
92—93 283 330 | — 78324 | + 5271 | — 65105 -+ 6729. 
93 Jidda, Mecca-gate 
and West, from O° to 360°. They had first to be reduced to astro- 
nomical azimuths counted also from North to East and for this 
purpose the magnetic declination was taken from the Adm. Chart 
of Jidda. For 1911 it was assumed to be 2°55’ West — 11 3’= 2°.4 
West, and this value was considered to hold good for the whole of 
the road. As length of the step 0".78 was adopted as given by 
Mr. Sati, and the length of the parts of the road expressed in 
meters shall be designated by /’. The 4" and 5‘ columns contain the 
co-ordinates «w and y in meters of points 2—93 relative to point 1, 
taking as axes the parallel and the meridian, so that we have 
oe Sena | Vailas aes a 
in which for point 2 the summation has to be extended over all the 
parts between point 1 and 7. 
The two values in the last line of the 4 and 5 columns of 
the table are the co-ordinates of the Mecea-gate at Jidda relative to the 
Entrance of Mecca. These may be compared with the corresponding 
differences deduced from the astronomical determinations. For this 
