World Health Organization (Continued) G/R.58 (Add.1) ANNEXES 1 AND 10 TO THE ABOVE DOCUMENT 1. Damage from point mutations in relation to radiation dose and biological conditions. (1) Accumulation (2) Linear relation to dose (3) Influence of local concentration of activations (4) Complications at high doses (5) Influence of cell type on induced mutation rate (6) Estimation of total damage from point mutations (7) Manner of distribution and expression of the total damage (8) The induced in relation to the spontaneous mutation damage (9) Species differences and the problem of extrapolation (10) Light from another source 10. Some problems in the estimation of spontaneous mutation rates in animals and man. World Meteorological Organization G/R.35 G/R.133 SUMMARY OF COMMENTS OF WMO ON PROCEDURES FOR COLLECTION AND ANALYSIS OF ATMOSPHERIC RADIOACTIVITY DATA Comments on measurementsof fallout and airborne activity; stresses the importance of cooperation between meteorologists in selecting sites wherefrom to obtain samples. EXCERPT FROM A LETTER DATED 6 NOVEMBER 1957 RECEIVED FROM THE SECRETARY-GENERAL OF THE WMO-INTERIM INTERNATIONAL REFERENCE PRECIPITATION GAUGE Brief report of the discussion held by the Executive Committee Panel on Atomic Energy and by the Commission for Instruments and Methods of Observations of the WMO on subjects related to the effects of atomic radiation. 202 Ssebey