Gassiot Subcommittee B on Photochemistry and Ultraviolet spectroscopy Appointed by Council at a meeting of 19 February 1942. Terms of reference; ' To investigate the dissociation of the polyatomic and other varying consitituents of the atmosphere due to the action of the sun's radiation and other causes, and to review and extend our knowledge of the ultraviolet spectra and absorption coefficients of the atmospheric gases. ' At back; list of papers Meetings held; 1. 6 March 1942 2. 29 May 1942 3. 4 September 1942 4. 3 November 1942 5. 18 December 1942 6. 27 February 1946 7. 3 December 1946 8. 3 March 1949 9. 7 December 1951 10. 15 January 1953 11. 26 February 1954 12. 21 April 1955 13. 19 March 1956 14. 19 April 1957 15. 13 May 1958 16. 23 April 1959 17. 16 March 1960 18. 11 April 1961 19. 23 May 1962 20. 22 May 1963 21. 22 May 1964 22. 26 May 1965 23. 29 April 1966 24. 5 May 1967 6 March 1942 to 5 May 1967