248 



PIERCE. 



see how much rehance may be placed in antenna resistance measure- 

 ments made by buzzer methods of excitation in comparison with 

 measurements made by excitation with gaseous oscillators and other 

 methods of continuous excitation. 



XI 



400 800 



1200 



1600 2000 ii400 



Figure 16. Total radiation resistance versus wavelength for the Antenna, 

 of the Battleship "Maine." Black dots are Dr. Austin's observed values; 

 heavy Hne, computations b\^ present theory; light line, computations by 

 doublet theorv. 



25. Example of Different Methods of Constructing an 

 Antenna that Will Have a Specified Resistance for a Given 

 Wavelength. — Let it be required to construct an antenna that will 

 have a given resistance (4 ohms, say) for a given wavelength (2000 



