Plate XVII from the first volume of Pettigrew’s Design in Nature (1908), illustrating “spiral formations in feathers and teeth, in the muscular arrangements of the heart, and in the cast of the ventricular cavities of the heart”.
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.