Sentence:  Intermittently might be heard the voice of the “barker” droning his droll catch-phrases, informing the inquisitive populace that for “one dime, ten cents or a tenth part of a dollar," they could see “the greatest wonder of the age, the <WSD>cinemagraph</WSD> showing -- MOV-ING PIC'-CHURES." 
Meaning of the word marked with <WSD> tags:  A movie, especially one from the silent era.