36G Dr. Barton and Mr. Lownds on Reflexion and 



one glance the continuous changes in A, a, B, and /3 as the 

 capacity changes without break from zero towards infinity. 

 Here, again, the full lines show the values of the constants 

 for the damping actually in use, and the broken lines the 

 ideal values when damping is absent. 



Table I. — Reflexion and Transmission Constants of 

 Intermediate Condensers. 



1 



Constants of 







Constants of 





Condenser 



Reflected Wave-Train. 





Transmitted Wave-Train. 



Damping 

 Constant of 



Cons! ant 













Incident 

 Wave-Train. 



x ' = LvS'p. 



a. 

 



a'. 



A. 



a. 



b. 



b'. 



B. 



+ 1 



|8. 















7T 



~ 2 





+ 1 

































Zero, i. e. 



1-21 



-•268 



-•443 



+ ■518 



-121° 



10' 



+ •732 



-•443 



+ •856 



-31° 10' 



Incident 



347 



-•751 



-•433 



+ ■867 



- 150° 



5' 



+ •249 



-•433 



+ •500 



-60° 5' 



Wave-Train 



8-95 



-•952 



-•214 



+ •976 



-167° 



25' 



+ •048 



-•214 



+ •22 



-77° 25' 



Undamped. 



00 



-1 







+ 1 



— 7T 



36' 













 + 1 



~2 

 





















- 84° 



+ 1 







Incident 



1-21 



-•249 



-■483 



+ •543 



-117° 



16' 



+ 751 



-•483 



+ •89 



-32° 46' 



Wave-Train 



. -kpt 



lse cos pt 



347 



-•775 



-•468 



+•906 



-148° 



52' 



+ ■225 



-•468 



+ •52 



-64° 19' 



where 

 k =00955 



8-95 



-•972 



-•220 



+•994 



-167° 



16' 



+ 028 



-•220 



+ •22 



-82° 43' 



as in 

 Experimental 



oo 



-- 1 







+ 1 



— 7T 

















-95° 24' 



Case. 



22. Reflexion at Electrometer negligible. — It is now 

 necessary to inquire whether the electrometer reflects any 

 appreciable part of the wave-train incident upon it. As 

 previously mentioned, this is not the case. 



Between the disks attached to the line at EE' ('fig. 1) the 

 ends of the needle are interposed, each disk with its adjacent 

 needle-end forming a condenser whose plates are 1 centim. 

 radius and 1 centim. apart. The electrometer as a whole 

 constitutes a set of two such condensers in series. Hence 

 the capacity interposed between E and E' is half that due to 

 one disk and needle-end. 



Taking the correction for the edges of the plates in a 

 parallel disk condenser given in Kohlrausch's ' Practical 

 Physics,' we thus obtain S', the capacity between E and E', 

 equals ^ x 10~ 21 in electromagnetic c.g.s. units. And for the 



