Chapter IV

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.

49_a_. Cause of Sensitive State Detected by SPOTTISWOODE
Telephone. and MOULTON

50. Sensitive State Illustrated by a REITLINGER and
Flexible Conductor within the URBANITZKY
Discharge Tube.

51. System of Operating Discharge Tubes. TESLA
Excessively High Potential and
Enormous Frequency.

52. Discharge-tube Phenomena by MOORE
Self-induced Currents.