From: J Clin Invest. 1931 August; 10(3): 545–558, BREATHING MEASUREMENTS ON NORMAL NEWBORN INFANTS, Douglas P. Murphy and Edward S. Thorpe, Jr.
From: J Clin Invest. 1931 August; 10(3): 545–558, BREATHING MEASUREMENTS ON NORMAL NEWBORN INFANTS, Douglas P. Murphy and Edward S. Thorpe, Jr.
Photograph provided by Richard Johnston & Carl O’Donnell
Photograph provided by Richard Johnston and Carl O’Donnell
Photograph provided by Richard Johnston, Carl O’Donnell