Supplement to IQSY Instruction manual no. 10, Cosmic ray tables

The report is a supplement to IQSY Instruction Manual No. 10, Cosmic Ray Tables by McCracken, et al. (1965), and contains the asymptotic directions, variational coefficients and cutoff rigidities for 48 stations not included in the original manual in addition to an explanatory text. The computer programs utilized to calculate the values given in the tables are given in the appendix.