1. Die Abweichung der Magnetnadel; Beobachtungen, Sacular-Variation, Wertund Isogonensysteme bis zur Mitte des XVIIIten Jahrhunderts;Bemmelen;OBSNS R MAGN MET OBS BATAVIA,1899
2. 150th anniversary of Gauss's first absolute magnetic measurement
3. A magnetic survey of the British Isles for the epoch January 1, 1886;Rücker;PHIL TRANS R SOC LONDON,1890
4. A memoir on the magnetic isoclinal and isodynamic lines in the British Isles, from observations by Professors Humphrey Lloyd and John Phillips, Robert Were Fox, Esq., Captain James Clark Ross, R.N., and Major Edward Sabine;Sabine;R.A. REPT BRIT ASSOC ADVANCEMENT SCI,1839