278 
LITTLEHALES, 
Lat. 13° 05' N. BARBADOS (BRIDGETOWN). Long. 59° 37' W. 
Year. 
Magnetic 
declina¬ 
tion. 
Authority. 
Observer. 
Where recorded. 
1726. 
o 
—3.91 
Mathews... 
Encyclopedia Metropolitana, London, 1848. 
1760. 
Do. 
1761. 
—3.78 
Do 
1833. 
—1.48 
Philips. 
Phil. Trans. Royal Society, 1875. 
18X9 .... 
—1.22 
Mil ne> . 
Do. 
1846 
—1.45 
Snhninhnrp-k . \ . 
Tin 
1882. 
0.42 
British Admiralty Chart. 
1888. 
1.03 
Lieut. F. H. Delano, U. S. N. 
Hydrographic Office, archive document. 
1890.4 .... 
1.30 
E. D. Preston, assistant, 
Bulletin No. 23, United States Coast and Geodetic 
United States Coast and 
Survey. 
Geodetic Survey. 
1892. 
0.80 
Lieut.W.W.Kimball, U.S.N. 
Hydrographic Office, archive document. 
1893. 
1.28 
.do. 
Do. 
Year. 
Observed. 
Computed. 
o-c. 
- 2 
O-C . 
o 
o 
1720 
—3.91 
—3.59 
—0.32 
0.1024 
1 
1760. 
—4.50 
—4.29 
—0.21 
0.0441 
. ■ 
1761. 
—3.78 
—4.29 
+0.51 
0.2601 
1833. 
—1.48 
—1.70 
+0.22 
0.0484 
1839. 
—1.22 
—1.35 
+0.13 
0.0169 
1 Probable error of a single observation = ± 15'. 
1846. 
—1.45 
—0.95 ’ 
' —0.50 
0.2500 
Period = 300 years. 
1882. 
-(-0.42 
+0.73 
—0.31 
0.0961 
1888. 
+1.03 
+0.90 
+0.13 
0.0169 
1890.4 .... 
+1.30 
+0.96 
+0.34 
0.1156 
1892. 
+ 0.80 
+0.99 
—0.19 
0.0361 
1893. 
+1.28 
+1.02 
• +0.26 
0.0676 
1.0542 
Empirical equation for finding- the declination for any year :. v — — 1°.54 + 2.62 
sin 1.2 (f — 1850) + 0.812 cos 1.2 (f — 1850). 
