DR. O. HEAVISIDE has investigated (NATURE, April 19) the slow motion of a charged conducting sphere through a uniform electric field, in a direction parallel to the electric force of the field ...

Scale bar, 1 mm. (f) Translational motion generated with a 275-μm glassy carbon sphere in a PDMS microchannel with a 4.3 kV m −1 electric field in an aqueous solution of 7 mM HCl and 14 mM HQ ...