William Blackwood and Sons
- William Blackwood and Sons published the following 2 sources, containing a total of 2 diagrams.
- Mellone, Sydney Herbert. 1905. An Introductory Text-Book of Logic. Edinburgh: William Blackwood and Sons. (1 diagram)
- Veitch, John. 1885. Institutes of Logic. Edinburgh: William Blackwood and Sons. (1 diagram)