In the last year the following experiments have been carried out: (A) magneto-oscillations have been observed in the dislocation drag process, (B) a rotational peak has been observed; this peak is related to the rotation of a magnetic field relative to the slip plane of deforming crystal, (C) twinning of a zinc crystal was shown to be related to the velocity of the dislocations involved. This correspondence between the nucleation of dislocation twinning and dislocation velocity has not been observed before.