  Data recorded by the JADE experiment at the PETRA e^+e^- collider were used
to measure distributions of new event shape observables. The distributions were
compared with resummed QCD calulations (O(alpha_s^2)+NLLA), and the strong
coupling constant alpha_s was determined at \sqrt{s}= 22, 35 and 44 GeV. The
results are in agreement with previous combined results of PETRA but have
smaller uncertainties. Together with corresponding data from LEP, the energy
dependence of alpha_s is significantly tested and is found to be in good
agreement with the QCD expectation.
