340 SCIENCE PROGRESS 



" dead beat," the hammer only striking once to each signal 

 sent from the transmitting station, i.e., to each traversal of a 

 given line by the style. The definition of the telegraphed 

 pictures is not interfered with seriously, and the results have 

 been most promising. 



It should be observed that the wireless apparatus is in a 

 purely experimental stage at present, and I do not anticipate 

 any application of it to commercial uses until wireless work 

 generally becomes more efficient. 



