This pioneering work showed little development until about the middle of the 19th century.
His voluminous writings in philology, natural history, physics and mathematics often accordingly have a good deal of the historical interest which attaches to pioneering work, however imperfectly performed; otherwise they now take rank as curiosities of literature merely.
During these two years he became convinced that the success of the white missionary in a field like Africa was not to be reckoned by the tale of doubtful conversions he could send home each year - that the proper work for such men was that of pioneering, opening up and starting new ground, leaving native agents to work it out in detail.
On early events of pioneering and colonization are: E.
On the traces of dragon and serpent myths in the Old Testament and their significance, see Gunkel, Schopfung and Chaos (1895) - a pioneering work of the highest merit - and Ency.
His chief title to fame, however, is his pioneering work in the application of the art of photography to astronomical research.