428 



GENERAL SCIENCE 



RAUTOTRAYERSO 



STOPPED DIAPASON 



OPEN DIAPASON 



FLUTE A CHIMINEE 



r-AN OPEN WOOD 

 PIPE HAVING A 

 UQUID. TRAVELING j 



10NE. 



THE UPPER UP IS 

 JGUEVELLED FROM 

 THE INSIDE. 



SAUOOHAi 



* 



Hg 



-f-A COVERED 

 PIPE OF MELLOW 

 FLUTE QUALTTY, 



SHALL OPEKIRS,^. 

 THROUGH 1 

 STOPPER AND 



5-LARCEST PIPE 

 8 FEET LONG, 

 LARGE .DIAMETER 

 THICK WAILS . 

 COMPOSITION 



45% SLOCK TIN. 



AWUSTASIE 

 ROLLER BEARD -^ 



CONtfcA 



GAHBA 



FIXED 9EARD 

 REFLECTS WAVE jj 

 ENERGY IN WARD," 



AN OPEN METAL PIPE 

 0E OCTAVE LOWER THAH 

 THE ViOLONCCLLO^WHICH 

 IT RESEMBLES IN QUALITY 

 OF TONE-LONGEST PIPE IS 

 (6 FEET IH LENGTH, 



HALF STOPPED 

 METAL PIPE WITH 

 CHIMNEY TOP. 

 A CHARACTER^ 

 FLUTE TONE. 



>E IS TUNED 8V 

 ENING OR< 

 ;THSFLEX!8LE| 

 AD EARS. 



PER UP IS 

 BEVELLED FROM 



AMERICAN Wl 

 BELLOWS MOTOP 



FIG. 318. The inte- 

 rior of a pipe organ. 

 Why are pipes which 

 produce heavy tones 

 in a pipe organ large 

 and long? What is 

 the difference be- 

 tween the pipe which 

 produces Vox hu- 

 mana and the Flute 

 a Chiminee? What 

 is the difference be- 

 tween the pipe which 

 produces Melodia 

 and the pipe which 

 produces the Open 

 Diapason? 



SECTION OF 

 CONCRETE SWELL BOX 

 SHOWINS TRIANGLE 

 MESH REINFORCEMEN1 



FLAT WIRE SPRING 

 'SEUMATIC 



)NTA!NING SOFT IRON 



THH H*CHET, WHEN ENERGIZED LIFTS THE DISC AND 

 R !H THE PNEUMATIC TO ESCAPE 





