Page:A Voyage of Discovery and Research in the Southern and Antarctic Regions Vol 1.djvu/182

1840

we had pursued, and beyond what it was possible to follow at this time of the year.

Observations on the Magnetic Force, Dip, and Variation, on board H.M.S. Erebus, during her Passage from Christmas Harbour, Kerguelen Island, to Hobart-town, Van Diemen Land.

Date.	Lat.	Log.	Intensity.	Dip.	Variation.	Remarks.
	° ′	° ′			° ′
June	48.41	68.54	1.465	69.596	30.34 W.	Christmas Harbour.
July 22	48.29	76.55	1.539	70.55	—
23	48.17	80.15	1.574	71.50	—
24	47.55	83.31	1.601	72.34	—
25	47.46	86.18	1.575	73.33	—
26	47.12	89.45	1.565	73.35	—
27	47.3	93.0	1.712	74.37	27.39 W.
28	47.13	97.7	1.712	too much	motion
30	47.39	102.42	1.855	74.28	—
31	47.35	106.26	1.863	74.31	21.39 W.
Aug. 1	47.45	110.39	1.815	75.8	—
2	47.34	114.15	1.970	75.26	14.47 W.
4	47.41	121.30	1.992	76.4	12.50
5	47.34	124.43	1.996	76.40	—
6	46.44	128.26	2.034	75.41	—
7	46.13	132.0	1.980	75.17	2.41 W.
8	45.59	135.38	1.989	73.48	0.55 E.
9	45.17	139.19	2.005	73.23	4.26
10	44.24	141.39	1.976	72.37	5.56
11	44.16	142.38	1.934	73.3	11.38
Hobart-town, Van Diemen's Land.
	42.52	147.27	1.824	70.40	10.24

The observations of the variation of the compass during this run were also of more than ordinary interest; the westerly variation gradually diminishing in amount until the eighth of August, when, in Aug. 8.lat. 46° S. and long. 134½° E., we crossed the line of no variation, and then as rapidly increased the easterly variation. This position of the line of no