690 



Mr. J. A. Cunningham on the 



Table III. 



Temp, of 

 Cathode. 



Potential Difference. 



Current. 



Pressure, 



mm. of 



Hg. 



Defln. 



°C. 



K-A. 



1200 



K-E. 



300 



E-A. 



900 



Defln. 



Amp. X 10 5 . 



437 



1040 



545 



3-27 



2-70 



439 



1043 



955 



272 



682 



6-70 



402 



1-95 



43-9 



1043 



810 



292 



518 



7-60 



4-56 



1-43 



43-9 



1043 



780 



300 



490 



7-70 



4-62 



1-35 



43-9 



1043 



(725)? 



(200) 



(525) 







100 



43-9 



1043 



750 



215 





(7-4) 



(4'5) 



074 



43-9 



1043 



690 



260 



430 



(7-8) 





053 



; 439 



1043 



565 



367 



199 



8-3 



4-98 



039 



! 439 



1043 



565 



377 



184 



8'15 



4-89 



0-280 



i 40-4 



986 



630 



440 



201 



7-7 



4-62 



0196 



J 42-7 



1020 



625 



432 



199 



7-7 



4-62 



0-196 



43-3 



1030 



(680) 



(490) 



207 



(7-3) 





0143 



43 1 



1028 



670 



468 



200 



7-6 



4-56 



0-096 



437 



1040 



710 



487 



226 



i (7-D 





0-068 



439 



1043 



800 



522 



282 



670 



4-02 



0-054 



43-9 



1043 



865 



502 



(363) 



605 



363 



0042 



43-9 



1043 



970 



464 



(506) 



i (5-5) 





0031 



43-9 



1043 



1045 



435 



(610) 



5-0 



3-00 



0027 



43-9 



1043 



1340 



437 



(900) 



33 



1-98 



0020 ! 



Table IV. 



Temp, of 

 Cathode. 



Potential Difference. 



Current. 



i 

 Pressure, 

 mm. of 

















Hg. 



I 



Defln. 



°C. 



K-A. 



K-E. 



E-A. 



Defln. 

 5-9 



Amp.xlO 5 . 



50-2 



1163 



960 



275 



661 



3-54 



1-90 



50-3 



1165 



810 



300 



512 



(6-6) 





1-40 



504 



1167 



730 



(317) 



413 



7-1 



4-26 



1-05 



50-4 



1167 



730 



296 



(430) 



7-0 



4-20 



0-74 



. 504 



1167 



685 



285 



(400) 



7-2 



4-32 



0-55 



1 50-4 



1167 



570 



366 



204 



7-5 



4-50 



0-40 



1 50-4 



1167 



570 



372 



195 



7-45 



4-47 



030 



| 50-2 



1163 



630 



426 



206 



7-2 



4-32 



0206 



I 50-4 



1167 



680 



482 



204 



(6-7) 





0-151 



I 50-4 



1167 



780 



565 



220 



6-3 



3-78 



0-108 



50-4 



1167 



770 



560 



210 



6-1 



3-66 



0079 



504 



1167 



795 



508 



284 







0055 



504 



1167 



900 



500 



(400) 



5-4 



3-24 



0-039 



50-4 



1167 



1080 



690 



(390) 



4-2? 



2-52? 



0-037 



50-4 



1167 



1450 



950 



(500) 







0025 1 



