1835.] Description of a self performing barrel organ. 343 



IV. — Description and draivimgs of a self-performing 



barrel organ. 

 To the Editor of the Madras Journal of Science. 



I have the pleasure to send you a description and 

 drawings of a self-performing barrel organ which I con- 

 structed about 3 years ago for my own amusement. — It 

 was made up entirely at Madras in all its parts, no 

 assistance of any kind whatever having been obtained 

 from Europe. The plan, design, contrivance of the 

 clock movements and mechanism, as well as the calcu- 

 lation of the trains of wheel work, and the execution of 

 the same are entirely my own, so that whatever the de- 

 fects, or the merits of the instruments, they centre in 

 myself. The only part I had made by another person 

 was the outward casing, which constitutes a handsome 

 piece of furniture made up by a Cabinet-maker. 



2. — I shall first describe the internal structure gene- 

 rally, and then enter into details of the various move- 

 ments ; afterwards, I will describe the apparatus I con- 

 trived for the purpose of setting music on the organ 

 barrels. 



3. — Figures 1 and 2 represent the skeleton framing 

 and general arrangement of the instrument. The frame 

 is 6 feet high : 3 ft. 9 in. broad, and the lower part 

 15 inches deep. A and B show the places where the 

 handle for winding up the weights is introduced : the 

 handle at A winding up the weight E by means of pul- 

 lies and the line G which passes round a barrel in the 

 clock movement C, giving motion to the organ barrel M. 

 The letter D represents the mechanism acted on by 

 the handle B, winding up the weight F, by means of the 

 line H, and from D by means of the rod I, working the 

 double bellows K, which throw wind into the reservoir 

 L, whence it passes into the wind chest to supply the 

 pipes ; but these, to avoid confusion, are not here 



