More news of contamination by toxic chemicals.--The Fifth Report of the Joint Committee of the British Trust for Ornithology and the Royal Society for the Protection of Birds on Toxic Chemicals, published in September, shows that in the chemical analysis of 236 bodies of birds sent in to the R.S.P.B. during the year from August 1963 to July 1964 only ten were found to be completely free from the r...

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