Mathematical and physical papers. Reprinted from the original journals and transactions, with additional notes by the author Q Science
A strange arthropod from the Mazon Creek of Illinois and the Trans Permo-Triassic Merostomoidea (Trilobitoidea) Q Science
Analytical psychology; a practical manual for colleges and normal schools, presenting the facts and principles of mental analysis in the form of simple illustrations and experiments, with 42 figures in the text and 39 experimental charts Q Science
