Figures & data
Figure 1. Medical students or doctors listening collectively to their own bodies using an electrical stethoscope. Photograph attributed to Central News, 1920s. Wellcome Library, London, Ref. L0029039.
![Figure 1. Medical students or doctors listening collectively to their own bodies using an electrical stethoscope. Photograph attributed to Central News, 1920s. Wellcome Library, London, Ref. L0029039.](/cms/asset/57ad874e-e7e9-4781-aac7-f9a741b216c0/rfso_a_1079076_f0001_oc.gif)
Figure 2. Graphic representations of breath sounds are sometimes printed in medical textbooks, especially in late nineteenth/early twentieth-century editions. Source: Crocket, Physical Examination of the Chest, 242, Fig. 55. Wellcome Library, London, Ref. L0073570.
![Figure 2. Graphic representations of breath sounds are sometimes printed in medical textbooks, especially in late nineteenth/early twentieth-century editions. Source: Crocket, Physical Examination of the Chest, 242, Fig. 55. Wellcome Library, London, Ref. L0073570.](/cms/asset/1c278247-4b69-4366-a7aa-578528f7900c/rfso_a_1079076_f0002_oc.gif)