J. W. Redfield, Popular Science Monthly (1874)
“ Nature really does form angles of varying acuteness and obtuseness to the base-line of the face at its two extremities—very acute angles between it and the front line of the face at its anterior extremity, and very obtuse angles between it and the line of the spinal column at its posterior extremity, in the lower vertebrates, and almost right angles at the same points in human beings. ”
