"On the Interpretation of Earth-current Observations." Conference on Terrestrial Magnetism, Bristol (1898).
“The application of terrestrial magnetism to the solution of some problems of cosmical physics." Conference on Terrestrial Magnetism Bristol (1898)
"On a single method of obtaining the expression of the magnetic potential of the earth in a series of spherical harmonics." Conference on Terrestrial Magnetism, Bristol (1898).