HISTORY OF MAURITIUS. 
382 
refraction, and 21° 13' 44",6 for the declination of the star, the resulting elevation 
of the Pole is 20° 9' 42",4. 
44 I also found in the same month, the distance of |3 of the Crow from the Zenith 
by four observations, on one side to be i° 52' 16",9 and by three on the other, to be 
i°49' 3 7 ^55 whole reduced to the 1st of January 1750. The error of the tele¬ 
scope, therefore, was 1' 19'',7 ; allowing i", 3 for the refraction, and taking the 
declination at 22 0 o' 40",o, there is for the elevation of the Pole, 20' 9' 41",5. 
“In December 1753, I found, by five observations, reduced to the 1st of Janu- 
ary 1750, the distance of (3 from the Whale, to the Zenith, to be o° 46' 27",9 on 
one side, and by four others, o° 49' 15", 7 on the other; the error of the instrument, 
therefore, is i' 23",9, and supposing the refraction to be o",6, and the declination 
of the star to be, 19 0 21' 51",!, the elevation of the Pole is 20° g' 43",5. 
4 ‘ On taking a medium between the four errors which have been found, it is evi¬ 
dent, that the sextant makes the distances from the Zenith too small by i' 2i",2; 
and it is that error to which I have attended in all the distances from the Zenith, 
which I have described in the preceding articles; nor shall I fail in doing the same 
with respect to those which I shall describe hereafter. 
44 1 have also observed by the same sextant, and reduced to the 1st of January, 
1750, five distances from e of Orion to the Zenith; and they have given me, by 
a medium, i 8°46' 15",5: I have added 21",5 of refraction, and the declination 
i°2 3 ' 3",3, as it appears in the catalogue which I have cited; from whence I con¬ 
clude the elevation of the Pole to be 20° 9' 40",3. 
