The Finnish Association for Sports Medicine saw the light of day.
A.J. Anthony and R. Rohland were the first to use an electromagnetic device, where the addition of oxygen dependented on the exhalation position. The counterweight of the spirometer clock dipped into a mercury barrel arranged so that an electrical circuit was closed at the highest position of the spirometer (exhalation position), resulting in the addition of oxygen through a valve operated by an electromagnet. The loss of volume of the O2 gas meter (the second spirometer bell) was recorded and gave a measurement of the O2 consumption.