Chapter VI

§ 65, Cathode Rays Outside of the Discharge LENARD
top of Tube whose Exit is an Aluminum
page Window. A Glow Outside of the Window.
53.

65., Properties of Cathode Rays in Open Air. LENARD
end of
page
53.

66. Phosphorescence by Cathode Rays Outside LENARD
of the Discharge Tube.

66_a_. Transmission Tested by Phosphorescence.

67. The Aluminum Window a Diffuser of LENARD
Cathode Rays.

68. Transmission of External Cathode Rays LENARD
through Aluminum and Thinly Blown
Glass.

69. Propagation of External Cathode Rays. LENARD
Turbidity of Air.

70. Photographic Action by External Cathode LENARD
Rays and at Points beyond the Glow.
No Other Chemical Power Probable.
Shadows of Objects by Light and by
External Cathode Rays Compared. No
Heat Produced by External Cathode
Rays.

71. External Cathode Rays and the Electric LENARD
Spark Distinguished. Aluminum Window
Not a Secondary Cathode.

72. Cathode Rays Propagated, but Not LENARD
Generated, in the Highest Possible
Vacuum. Air Less Turbid when
Rarefied.

72_a_. Cathode Rays, while Traversing the LENARD
Exhausted Observing Tube, Deflected
by a Magnet. No Turbidity in a Very
High Vacuum.

72_b_. An Observing Tube for Receiving the LENARD
Rays and Adapted to be Exhausted.

73. Phenomena of Cathode Rays in an LENARD
Observing Tube Containing
Successively Different Gases at
Different Pressures. Phosphorescent
Screen Employed for Making the Test.

74. Cause of the Glow Outside of the LENARD
Aluminum Window. Glow Not Caused by
External Cathode Rays. Sparks Drawn
from the Aluminum Window.
Transmission of External Cathode Rays
Dependent Alone upon the Density of
the Medium.

75. External Cathode Rays of Different LENARD
Kinds Variably Diffused. Theoretical
Observations.

76. Law of Propagation of External Cathode LENARD
Rays.

77. Charged Bodies Discharged by External LENARD
Cathode Rays. Discharge at Greater
Distances than Phosphorescence. Not
Certain as to the Discharge Being
Directly Due to Intermediate Air.

78. Source, Propagation, and Direction of DE KOWALSKIE
Cathode Rays. General Conclusions.