SECT. 1] THE MAGNETIC FIELD OVER THE OCEANS 215 



Bullard, E. C, 1956. Edmond Halley (1655-1742). Endeavour, 15, 189-199. 



Bullard, E. C, 1961. The automatic reduction of geophysical data. Oeoj)hys. J ., 3, 237-243. 



Bullard, E. C, C. Freedman, H. Gellman and J. Nixon, 1950. The westward drift of the 



earth's magnetic field. Phil. Trans. Roy. Soc. London, A243, 67-92. 

 Bullard, E. C, M. N. Hill and C. S. Mason, 1962. Chart of the total force of the earth's 



magnetic field for the North-Eastern Atlantic Ocean. Geomagnetica, pp. 185-191. 



Servi^o Meteorologico Nacional, Lisbon. 

 Bullard, E. C. and R. G. Mason, 1961. The magnetic field astern of a ship. Deep-Sea Res., 



8, 20-27. 

 Bullard, E. C, A. E. Maxwell and R. Revelle, 1956. Heat flow through the deep sea floor. 



Advayices in Geophys., 3, 153-181. 

 Cahill, L. J. and J. S. van Allen, 1956. High altitude measurements of the earth's magnetic 



fleld with a i^roton precession magnetometer. J. Geophys. Res., 61, 547-559. 

 Chapman, S., 1941. Edmond Halley as physical geographer, and the story of his charts. 



Occas. Notes Roy. Astr. Soc, No. 9, 117-134. 

 Chapman, S. and J. Bartels, 1940. Geomagnetistn. Clarendon Press, Oxford. 

 Chapman, S. and T. T. Whitehead, 1923. The influence of electrically conducting material 



within the earth on various phenomena of terrestrial magnetism. Trans. Camb. Phil. 



Soc, 22, 463-482. 

 Crichton Mitchell, A., 1932. Chapters in the history of terrestrial magnetism, Chapter I. 



On the directive property of a magnet. Te7-r. Mag., 37, 105-146. 

 Crichton Mitchell, A., 1937. Chajaters in the history of terrestrial magnetism. Chapter II. 



The discovery of the magnetic declination. Terr. Mag., 42, 241-280. 

 Day, A. A., M. N. Hill, A. S. Laughton and J. C. Swallow, 1956. Seismic prospecting in the 



western approaches of the English Channel. Q. J. Geol. Soc London, 112, 15-44. 

 Driscoll, R. L. and P. L. Bender, 1958. Proton gyromagnetic ratio. Phys. Rev. Let., 1, 



413-414. 

 Driscoll, R. L. and P. L. Bender, 1958a. A free precession determination of the proton 



gyromagnetic ratio. I.R.E. Trans., 1 (7), 176. 

 Eardley, A. J., 1951. Structural Geology of North America. Harper, New York, p. 430. 

 Finger, D. L., G. I. Kolomiytseva, V. V. Noyysh and G. M. Priyezzhev, 1961. Experi- 

 mental survey of terrestrial magnetism with magnetometers towed behind an iron 



ship. Geomagnetizni i Aeronomiya, 1, 421-425. 

 Flemings J. A., 1937. Magnetic survey of the oceans. In International Aspects oj Oceano- 

 graphy by Vaughan, T. W. National Academy of Sciences, Washington. 

 Gaiber-Puertas, C, 1953. Cons. Sup. Inves. Cient., Memoria no. 11. 475 pp. 

 Galperin, E. I., A. V. Goryachev and S. M. Zverev, 1958. The Pacific Geologo -Geophysical 



Expedition, U.S.S.R. Academy of Sciences, 1957 (XII Seismology) no. 1. Akad. Nauk 



S.S.S.R., Moscow. 

 Girdler, R. W., 1958. The relationship of the Red Sea to the East African Rift system. 



Q. J. Geol. Soc London, 114, 78-105. 

 Gii'dler, R. W. and G. Peter, 1960. An example of the importance of natural remanent 



magnetization in the interpretation of magnetic anomalies. Geophys. Prospecting, 8, 



474-483. 

 Harradon, H. D., 1944. Some early contributions to the history of geomagnetism — VII. 



Terr. Mag., 49, 185-198. 

 Heezen, B. C, M. Tharp and M. Ewing, 1959. The floors of the oceans, I, The North 



Atlantic. Geol. Soc Amer. Spec Paper 65, 122 pp. 

 Hellmann, G., 1897. Die Anfange der magnetischen Beobachtungen. Z. Ges. Erdk., 32, 



112-136. 

 He]Di3ner, J. P., J. D. Stolarik and L. H. Meredith, 1958. The earth's magnetic field above 



WSPG, New Mexico, from rocket measvirements. J. Geojyhys. Res., 63, 277-288. 

 Hill, M. N., 1959. A ship-borne nuclear-spin magnetometer. Deep-Sea Res., 5, 309-311. 



