Dr. Ketkar's work on the encyclopaedia occupied him approximately from 1916 until 1928. He was not only the originator and the editor, but also the accountant and thegeneral manager of the entire project.
The encyclopaedia was published in 23 volumes. The first 5 volumes are introductory, and consist of a series of lengthy articles on various sociological and historical subjects. They are titled as follows:
- Volume 1: Hindustan ani Jaga (?????????? ???? ??, India and the World)
- Volume 2: Vedavidya (?????????, Vedic Knowledge)
- Volume 3: Buddhapurva Jaga (?????????? ??, The World Before Buddha)
- Volume 4: Buddhotar Jaga (?????????? ??, The World After Buddha)
- Volume 5: Vijnanetihas (?????????????, History of Sciences)
Volumes 6 through 21 consist of an alphabetically arranged series of short articles (as in a conventional encyclopaedia). Volume 22 is the index (????), and finally volume 23 (Hindusthan, ??????????) contains some additional information about India.
A vivid account of his experiences about this project is contained in his book
Maze baara varshanche kaam, urf jnanakosha mandalacha itihas (???? ???? ???????? ???, ???? ???????? ??????? ??????, Twelve Years of My Work, or the History of the Encyclopaedia Committee).