This page has links to historic data of the UK Infrared and Raman Discussion Group, the IRDG.
Past meetings lists:
100-149 (Dec. 1982 - April 1996): http://www.irdg.org/meetings/irdg-100-149/.
150-199 (Oct. 1996 - Oct. 2012): http://www.irdg.org/meetings/irdg-150-199/
Below is copy of the Minutes of the 1st IRDG Meeting, held on 20th January 1950: