John Hutchinson's mysterious machine.
Petty
T L
TL
D006333:Heart Failure / Q000175:diagnosis; D049672:History, 19th Century; D008131:London; D008173:Lung Diseases, Obstructive / Q000175:diagnosis; D008175:Lung Neoplasms / Q000517:prevention & control; D009026:Mortality; D011654:Pulmonary Edema / Q000175:diagnosis; D013147:Spirometry / Q000266:history / Q000639:trends