TABLE VII.

DISRUPTIVE DISCHARGE THROUGH BOILED LINSEED OIL, 21° C.

Maximum
Difference

TABLE XIII.

LUMINOUS EFFECTS AND CREEPING DISCHARGE.

Width of Electrostatic Corona, w = 27.5 (V— 2)2.
Length of Creeping Discharge, d = 55 (V — 2)2.

Thickness
of

in Milli

of Potential Mica Disk

Corona in Kilo-Volts
in
per
Centimetres Centimetres Centimetres. Centimetre.

in

Faint bluish glow between electrodes, visible in the dark.
Perceptible bluish glow, visible in the dark.

Considerable bluish glow, faintly visible in broad daylight.

Intense bluish glow; begins to send out short creepers of about .2 cm. length.
Considerable smell of ozone.

SPARKING DISTANCES IN AIR, IN MILLI-CENTIMETRES.