Imágenes de encabezamientos y en el cuerpo de las páginas:
- Internet Archive Book Images Image from page 11 of "Catalogue of Sharp & Smith : importers, manufacturers, wholesale and retail dealers in surgical instruments, deformity apparatus, artificial limbs, artificial eyes, elastic stockings, trusses, crutches, supporters, galvanic and fara (CC0 1.0 Universal (CC0 1.0) Public Domain Dedication)
- The Library of Congress Image from page 27 of "The human body. A beginner's text-book of anatomy, physiology and hygiene .." (1884) (CC0 1.0 Universal (CC0 1.0) Public Domain Dedication)