The stratifications of hydrogen

The following pages give the outcome of attempts to prepare pure hydrogen, and experiments on the stratifications exhibited by the purified gas under the influence of an induction current. The researches were commenced in 1884 and have been continued intermittently to the present time. The original apparatus consisted of a vacuum tube of soda-glass, 6 inches long and ½ inch wide, having sealed-in aluminium terminals at each end. The pole at one end was ring shaped, at the other pointed. The vacuum tube was connected to the mercury pump at one end, a tightly packed phosphoric anhydride tube intervening.