Abstract
The magnetic drift velocity W M relating to the drift of an electron swarm in crossed electric and magnetic fields has been measured in hydrogen and uterium at 293�K. The measurements were made using Huxley's method of asuring Wx/W., the ratio of the transverse to the longitudinal drift velocity. Data re given for W M and for the magnetic deflection coefficient 'l' for 6�1 X 10-19 < E/N