Magnetic observations made at Stonyhurst College Observatory, from April 1863 to March 1870

von Perry, Stephen Joseph
Veröffentlicht in Philosophical transactions of the R. Society of London ; Vol. 161,1. 1871 (1871)

Magnetic Survey of the East of France in 1869

von Perry, Stephen Joseph
Veröffentlicht in Philosophical transactions of the R. Society of London ; Vol. 162,1. 1872 (1872)

Account of observations of the transit of Venus, 1874, December 8 : made under the authority of the British government: and of the reduction of the observations

von Airy, George Biddell
Veröffentlicht 1881