[3] L. A. Bauer, United States Magnetic Declination Tables and Isogonic Charts, and Principal Facts relating to the Earth’s Magnetism (Washington, 1902).
*4 Balfour Stewart, “Terrestrial Magnetism” (under “Meteorology”), Ency. brit. 9th ed.
*5 C. Chree, “Magnetism, Terrestrial,” Ency. brit. 10th ed.
[6] M.Z. 1906, 23, p. 145.
[7] (3) p. 62.
[8] K. Akad. van Wetenschappen (Amsterdam, 1895; Batavia, 1899, &c.).
[9] Atlas des Erdmagnetismus (Riga, 1903).
[10] (1) p. 16, &c.
[11] Kolaba (Colaba) Magnetical and Meteorological Observations, 1896. Appendix Table II.
[12] (1) p. 21.