Class F - Scientific correspondence

This class includes two series of Batchelor’s correspondence files and also loose scientific correspondence that was not filed. The alphabetically-arranged files of correspondence (F1 and F2) begin with letters from the 1940s. Probably at the beginning of 1980, with the size of the files increasing, a second series was begun. The files in the first series thus practically finish in 1979, however occasionally letters of a later date were inserted, hence the covering dates of some files in this continue beyond 1979. A third series (F3) has been created for the correspondence that was not filed. A correspondent’s appearance in this third series does not indicate that they do not appear in series F1 and/or F2.