328 
LITTLEHALES. 
Lat. 53° 01 / N. PETKOPAVLOVSK. Long. 158° 43' E. 
Year. 
Magnetic 
dip or in¬ 
clination. 
Authority. 
Observer. 
Where recorded. 
1779.7 .... 
o 
( +63.08 
J. King. 
Voyage to the Pacific, 1784. 
1804.7 .... 
+63.53 
A. J. von Krusenstern. 
Coast and Geodetic Survey Report for 1885, Ap- 
pendix No. 6. 
1827.6 .... 
+64.03 
F. W. Beechey. 
Voyage to the Pacific, 1825-28, London, 1831. 
1827.8 .... 
+64.12 
F. P. Liitke. 
Memoires, St. Petersburg Acad., 1838. 
1829.8 .... 
+63.82 
Ad. Erman. 
Reise ura die Erde, Berlin, 1835. 
1837.7 .... 
+64.08 
Du Petit Thouars. 
Voyage autour du Monde, Paris, 1843. 
1854.6 .... 
+64.78 
Frigate Aurora. 
1876.5 .... 
+64.23 
M. L. Onazevich.... 
Magnetic Observations obtained in 1890 in the 
East Siberian Sea provinces by E. Schtelling. 
1890. 
+64.48 
E. Schtelling_ 
Do. 
Year. 
Observed. 
Computed. 
O-C. 
o^c 2 . 
1779.7 .... 
o 
+63.08 
o 
+63.17' 
—0.09 
0.0081 
1 
1804.7 .... 
+63.53 
+63.59 
—0.06 
0.0036 
L827.6 .... 
+64.03 
+63.97 
+0.06 
0.0036 
1827.8 .... 
+64.12 
+63.98 
+0.14 
0.0196 
Probable error of a single observation = ± 10'. 
1829.8 .... 
+63.82 
+64.00 
—0.18 
0.0324 
Period -= 360 years. 
1837.7 .... 
+64.08 
+64.12 
—0.04 
0.0016 
1854.6 .... 
+64.78 
+64.33 
+0.45 
0.2025 
1876.5 .... 
+64.23 
+64.49 
—0.26 
0.0676 
1890.0 .... 
+64.48 
+64.53 
—0.05 
0.0025 
0.3415 
Empirical equation for determining the inclination for any year: I = 63°.54 + 
0.66 sin (t — 1850) + 0.74 cos (t — 1850). 
