American Professor of Physiology Francis Gano Benedict (1870-1957) reduced the size of his respiration device, the device became so compact that it was transportable.
As a result, it could be brought from one hospital room to another without extra assistance and without having to disassemble it. Instead of sulfuric acid, he now used calcium chloride for the absorption of water vapor. That same year he reported on the construction of a large room in which at least twelve bedridden persons could take place and in which the carbon dioxide production of a group could be determined. That same year, he also published a report on metabolic standards with extensive tables based on age, sex, height and weight.
In France a course 'Health and Physical Education' was started.
French military physician-major Maurice Boigey (1877-1952), who was also Professor of Physiology at the University of Lyon, succeeded George Demeny (1850-1917) as head of the Ecole de gymnastique de Joinville and a year later installed labs for mechanics, physiology, chemistry, radiology and photography in this school. In 1922 he published a manual on physical education.
German physics engineer August Wohlmuth (1844-1913) introduced galvanic weak current therapy in Medicine with a device developed by him. On the photo a model from 1919.