r.'u 



Pnpuldr Srinirr Moiitlili/ 



The cylinder is divided into 

 two parts. A nilcd strip of 

 pnpcr encircles one side and 

 fifteen lines of smnll holes 

 the other. The lender makes 

 his inflection marks on the 

 paper at the first rehearsal 



wliuh is placed in the center of tlic 

 orchestra. The current actuates an 

 electromagnet, the plunger of which 

 catches in small notches in the left- 

 hand rim of the cylinder and turns il 

 a short distance. Even- time the contact at the 

 I>rojcction machine is made, the magnet turns 

 tlie cylinder a distance equal to one of the 

 notches. The apparatus is so arranged that 

 when the five or six reels of film which constitute 

 the ph<ilopla>- have been shown on the screen, 

 the cxlinder in the orciiestra pit has matie, in a 

 succession of short steps, one complete re\dlution. 

 The face of this cylinder which is made from 

 an ordinary steel imlley, isdi\ided into two parts, 

 as shown. Fifteen parallel lines of equalh' 

 spaced small holes, are bored around one side, 

 while a strip of ruled jiaper encircles the other. 

 W'lun the orchestra leader \-iews the film for the 

 lirsl lime he makes small (lencil dots on the 

 paper c\ Under, as the drum slowK' re\ol\-es. He 

 has fifteen ruled olT columns in which to place 

 dots, each column being allotted to a certain 

 musical cue. Let us say, for illustration, that 

 the opening scene of the film calls for loud, 

 exciting music. A stationary index-card, fasten- 

 ed on a fr.ime al)ove the cyliniler, informs him 

 liiat fortissimo, or ff, shall be indicated in 

 column No. 2 on the paper record. He makes a 

 pencil mark in that space. As the film progresses 

 its dr.imalic (|ii.ilil\ changes, let u> sa\\ to 



