Articles, reports and correspondence regarding cosmic rays:
A reprint from the 'Philosophical Magazine', Vol. 4, No. 44, p. 973, August 1959, of 'The Apparent Sidereal Daily Variation of Cosmic Ray Intensity During the Recent Sunspot Minimum' by S.P. Baliga and T. Thambyahpillai, Physical Laboratories, University of Ceylon, Colombo.
A report from Atomic Energy of Canada Ltd, 28 November 1960, entitled 'I G Y [International Geophysical Year] Equipment at Deep River Cosmic Ray Station B211', with correspondence, graphs and 5-minute readings from Deep River neutron intensity monitor B211 of a solar injection, 2-15 November 1960.
Miscellaneous correspondence regarding cosmic ray monitors, with data from various stations.
A reprint from 'Il Nuovo Cimento', Series X, Vol. 13, pp. 96-107: 'The Attenuation Length of the High Energy Nucleonic Component of the Cosmic Radiation near Sea Level' by K.G. McCracken, Physics Department, University of Tasmania, and D.H. Johns, Antarctic Division, Department of External Affairs, Melbourne.
Correspondence between T. Gold, Royal Greenwich Observatory, and A.W. Wolfendale, University of Durham, informing Gold of the proposed establishment of a high-flux, high-energy cosmic ray spectrograph.
Correspondence between D.R. Palmer, R.G.O., and A.J. Marx, Laboratoire de Physique Cosmique, on the proposed establishment of a European system of sounding balloons for the measurement of cosmic ray intensities.