The encyclopedia was printed in 1904, 1905, 1907, 1909, and 1911. Then a second edition was made from 1914 to 1917. By that time Peck and Gilman had died, so Talcott Williams helped edit. A 3rd edition was made in 1923, and more subjects were added to it in 1927 and 1930. A final edition was made in 1935. 