ELECTRIC WAVE TELEGRAPH Y—FLEMING. 193 
safe generalizations on this matter, but doubtless these will be accu- 
mulated in course of time. 
Wireless telegraphy has now reached a position of such importance, 
especially in connection with supermarine communication, that scien- 
tific research for its advancement should have the utmost possible 
encouragement, subject, of course, to the consideration that there is 
only one ether for us all. Whilst we derive satisfaction from the 
thought that so much valuable discovery and invention has already 
rewarded the labors of workers in many lands, we have but to glance 
around us to see in all directions, in connection with it, unsolved prob- 
lems, untrodden paths, wide fields of knowledge ripe for harvest in 
which the sickle of the reaper has never yet been moved. 
