This section is from the "A Complete Dictionary of Dry Goods" book, by George S. Cole. Also available from Amazon: A complete dictionary of dry goods and history of silk, cotton, linen, wool and other fibrous substances,: Including a full explanation of the modern processes ... together with various useful tables.
Blazer. A bright colored, loose summer coat, usually of striped flannel, worn by tennis and cricket players. The origin of the word is as follows: The boat club's uniform at St. John's College is bright red, and the St. Johnian jackets have for many years been called blazers, on account of being of such fiery color. Up to a few years ago the inaccurate modern term of blazer for a jacket of any other colorthan red, was unknown.