PUBLIC ADDRESS SYSTEMS 



141 



One of the largest and most successful uses to which this equip- 

 ment has been put took place on Armistice Day in 1921 when 20,000 

 people in San Francisco, 35,000 people at Madison Square Garden, 

 New York City, and approximately 100,000 people at Arlington 

 Cemetery neai Washington joined in the impressive ceremonies 

 which took place at the burial of the Unknown Soldier. Figs. 15, 

 16 and 17 are views at the three cities, during the ceremonies. 



Some of the other uses which have been made of the public address 

 system are the Republican and Democratic Conventions prior to the 

 last presidential election, after-dinner speaking in large ballrooms 

 and in halls where speakers have to address large audiences. There 



Fig. 17b. 



is one more application of this type of equipment which is gaining 

 rapidly in its use. This last is the application of the speech input 

 equipment to radio broadcasting. The broadcasting of the opera, 

 "Aida," from the Kingsbridge Armory, and of the Philharmonic 



