CHAPTER II.. 28. Actions of Magnetism Upon the Arc and Davy,

28. Actions of Magnetism upon the Arc and DAVY, Flame. BANCALARI, and QUET

29. Rotation of Luminous Discharge by a DE LA RIVE Magnet. Application in Explaining Aurora Borealis.

30. Action of Magnet on the Cathode Light. PLÜCKER and Relations Different according to the HITTORF Position Relatively to the Magnetic Lines of Force.

31. Discharge Retarded Across, and THOMSON, J. J. Accelerated Along, the Lines of Magnetic Force.

32. Resistance of Luminosity of the THOMSON, J. J. Discharge Afforded by a Thin Diaphragm.

33. Forcing Effect of the Striæ at a SOLOMONS Perforated Diaphragm.