Class 12 - Production of commodities by means of commodities

Sraffa drew on notes from as early as 1926 when preparing this work. Annotations dating from the 1950s made on the files in which these notes were kept indicate the items that Sraffa felt were most important, and which were often removed to other files as he was preparing for publication, they also show his dissatisfaction with areas of his earlier work. Notes and formulae by Abram Besicovitch and others are evident in a number of these files