The format is adapted to the needs of writers. The collection of synonyms and antonyms are organized under six general categories each of which has subcategories:
1) Abstract relations
2) Space
3) Matter
4) Intellect
5) Volition
6) Affections
Many words, of course, will appear in more than one category. And "form" follows function. For example, each subcategory is printed beside its antithesis, in parallel columns.
The edition is "enlarged and revised" by two successor Rogets, reprinting the 1933 edition. John Lewis Roget lived 1828-1908. ( )