In the 18th century, the word theosophy came into more widespread use among some philosophers. However, the term "theosophy" was still "practically absent" throughout the entire eighteenth century in dictionaries and encyclopedias, where it only appeared more and more frequently beginning in the second half of the nineteenth century. Theosophers themselves used the word theosophy sparingly, at least up until the middle of the nineteenth century. Johann Jakob Brucker (1696–1770) included a long chapter on theosophy in his monumental work (1741). He included theosophers alongside other currents in esotericism in what was then a standard reference in the history of philosophy. By the 18th century, the word "theosophy" was often used in conjunction with panosophy. The term "theosophy" is more properly reserved for the reverse process of contemplating the divine in order to discover the content of the concrete universe.