90 



Mr. E. H. Barton. Electrical Interference [June 15, 



and 



b = 



c = 



l\ \J$ 



d + C," d/d + i 



C 2 /C, 



J 



14. II. Relation between the various coefficients involved when the 

 second part of the conductor has finite length, and is succeeded by a third 

 part like the first. This abnormal intermediate part of the conductor 

 may sometimes be referred to as " the condenser." 



FIG. 2. Diagrammatic View of Waves, drawn, for clearness' sake, as though they 

 were rays incident and reflected obliquely. BB' shows the boundary 

 between the first and second parts of the conductor; CC' shows that 

 between the second and third parts. The small letters near the arrows 

 are the amplitudes of the waves. 



The values of b and c in fig. 2 have already been determined, and 

 we have by the same equation [viz. : (10)] 



and 



whence 



cf = 



= l-6 2 



15, III. Theory of the multiple internal reflections of a damped 

 electrical wave in the abnormal part of a conductor (the previous and 

 succeeding parts being alike} with expressions for the intensities of the 

 resulting transmitted and reflected disturbances. Let the equation of 

 the wave in the first part of the conductor be 



(15), 



y = ae~ at+a i x 



i x sn t 



where 



