no. 1863 bibliograph^■ of canal rays — fulciikr 31i 



Heating Effect. 



Obstacles struck are warmed: Vi(i34i); Ari(327); Swi(393). 



Heating of end of tube measured calorimetrically ; 10 to 20 per cent of 

 total energy of discharge regained as heat: Ewl(i83, 

 199). Measured bolometrically: W4(425). 



Mica mill-wheels rotated, probably a thermal radiation effect: Swi(393). 



12. MISCELLANEOUS EFFECTS. 



Charged Electrodes do not appreciably affect rays: Vi; V3(i5) ; 03(208). 

 Bundles Cross without any apparent interference: 01(698, 46). 

 Ionization of Oas takes P'lace if canal rays have sufficient velocity (500 v.) : 

 8x3(170, 427). 

 Second discharge may be passed through part of tube traversed by the 

 rays using only one-fourth the potential otherwise re- 

 quired: WS (470-3). 

 Effect makes the use of an electrostatic field diflficult: W3(447). 

 Screening Effect. Electric waves are absorbed by a tube traversed by canal 

 rays: WS(47o). 



13. spectrum of light from canal rays. 



The light may be received in a collimator pointed in a direction parallel 

 or perpendicular to the rays. In the former case, whatever light is being 

 radiated from the particles forming the rays while they are in motion should 

 show a Doppler effect, since the wave length of the light from the moving 

 particles will be slightly altered by the motion in the line of sight, causing a 

 shift in the position of the lines in the spectrum. There is always besides 

 the "displaced line" the "rest line" with, usually, an "intensity minimum" 

 between: 822(905). 



Aluminum Lines show Doppler effect. — XX 3944, 3962. Intensity weak: 



823(822). 

 In Air. Band spectrum of N appears: 01(692, 39). 



In Argon. Doppler effect observed for 20 lines surely; for ten more, prob- 

 ably: Di. 

 In Carbon Dioxide. 



Contains C line X4267 and H lines, all very bright. N, Swan, and C 



bands also present: Kn3(37). 

 Doppler effect shown by H lines and X4267: Kn3(37) ; Si9f2 (photo). 

 X4267. Shift of 5A with 10,000 v.: Kn3(37). 

 H lines more intense for lower pressures: Kn3(37). 

 Band spectrum shows no Doppler effect: Kn3(37). 

 In Helium. 



Doppler effect shown by X 4472 and other lines: 8i9fr(Rau) ; Di(589). 

 Negative results: Raui(423) ; Hl2(i5, 16). 



