Labels:car | clock | door | earth | fan | french horn | shelf | sky OCR: VALVE LEVERS HERE ARE THREE MAIN LEVERS which you control with i the mi ddle fingers of your left hand. These levers oper ate three valves. When a Iever pressed it moves rods hich cause the rotary valve to turn. This allows a 'into an extra Iength of tubing and changes the pitch of the note The French horn also hasa fourth valve the thumb valve which is used to cut out a third of the tubing to change the pitch of the horn flat. This helps to play the hi gher notes LEVER alows alse thumh
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