451 
CASE IV: 
LIJR, VJR, WIP. 
Method of observation as in II. 
| 
a : …_ Intensity Phenomena at the switching 
Number | Polarizer Analyzer of the field a RARE: Bald, 
22 -— — 3600 Decrease of intensity. 
23 — C a i ss 
24 D * " » 
25 A = | » ” ” 
26 A AM Seok | 3 : 
27 A D | i" ” » ') 
28 B i” ” » 
29 B ” » » 
30 B cc p ” » a 
CASESV, 
Li/VijWIJR. 
Method of observation as in II, but the distance 
between the condensator plates was 2 cm. 
In this case-the use of polarizer and analyzer has no sense as all 
directions perpendicular to the direction of observation are equivalent. 
_ Intensity | Phenomena at the switching 
GINGEN ‚of the field | on of the field 
31 | 3750 | Increase of intensity 
10. Dispersion phenomena. Only the dispersion in the dichroism 
was investigated. The same arrangement as for the dispersion in the 
double refraction was used. In this way was found, that the difference 
in absorption for vibrations parallel with and perpendicular to the 
field (according to nrs. 20 and 21 a positive quantity) increase, 
when the wavelength decreases. 
11. Possible explanation of the phenomena. Voict*) has shown, 
how the eleetrie dichroism can be explained by taking into con- 
sideration the absorption in LanGrvrn’s orientation theory; further 
that in a region of absorption the absorption power must undergo 
an influence of the field for natural light too. The occurrence 
1) Without field the intensity of light less than for 26. 
a ” ” ” ” ” ” ” ” „ 29. 
3) Voier, Gött. Nachr. 1912, 577; Graetz, Handbuch der Elektrizität und des 
Magnetismus 1, 338, 1914. 
