Plate from the first volume of Pettigrew’s Design in Nature (1908), illustrating “the spiral formation of human bones as seen in the arm, leg, vertebral column, clavicle, scapula, and pelvis”.
Featured on PDR in the essay The Spiralist
Why do helical seashells resemble spiralling galaxies and the human heart? Kevin Dann leads us into the gyre of James Bell Pettigrew’s Design in Nature (1908), a provocative and forgotten exploration of the world’s archetypal whorl.