classic papers of the week -- 217

On the possibility of determining Hubble's parameter and the masses of galaxies from the gravitational lens effect

• Refsdal, S. (Institute of Theoretical Physics, University of Oslo)

An attempt to detect a neutral particle of small mass

• Chadwick, J. (Gonville and Caius College); Lea, D. E. (Trinity College)

A possible origin of the Hawaiian Islands

• Wilson, J. T. (Institute of Earth Sciences, University of Toronto)