23. Different Vacua Needed for Luminosity ALVERGNIAT by Friction and by Discharge.
24. Phenomena of Discharge around the Edges STEINMETZ of an Insulating Sheet.
25. Highest Possible Vacuum Considered as a MORGAN Non-conductor.
26. Constant Potential at the Terminals of DE LA RUE and a Discharge Tube. MÜLLER
26_a_. Polarity of Discharge-tube Terminals in KLINGENBERG Secondary of Ruhmkorff Coil. Mathematical Deductions.
27. Pressure in Discharge Tube Produced by KINNERSLEY, a Spark. HARRIS, and RIESS
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.
35. Electrographs on Photographic Plate by SANFORD and Discharge. MCKAY
36. Positive and Negative Dust Pictures LICHTENBERG upon Lines Drawn by Electrodes.
36_a_. Photo-electric Dust Figures. HAMMER
37. Electrical Images by Discharge KARSTEN Developed by Condensed Moisture.
38. Bas-relief Facsimiles by Electric PILTCHIKOFF Discharge.
39. Distillation of Liquids by Discharge. GERNEZ
40. Striæ. Black Prints on Walls of Tube. DE LA RUE and MÜLLER
41. Discharge Tube in Primary Current. GASSIOT Striæ. Least E. M. F. Required.
42. Current Interrupted Inside of Discharge POGGENDORFF Tube instead of Outside.
43. Source of Striæ at the Anode. Color DE LA RUE and Changed by Change of Current. MÜLLER
44. Dark Bands by Small Discharges SOLOMONS Disappear on Increase of Current, and Appear Again by Further Increase.
45. Motion of Striæ. Method of Obtaining SPOTTISWOODE Motion when Desired and of Stopping the Same.
46. Motion of Striæ Checked at the Cathode. THOMSON, J. J. Tube, 50 ft. Long. The Anode the Starting-point.
47. Electrolysis in Discharge Tube. THOMSON, J. J.
48. Heat Striæ without Luminous Striæ. DE LA RUE and MÜLLER
49. Sensitive State. Method of Obtaining. SPOTTISWOODE Telephone Used to Prove and MOULTON Intermissions.