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34 if it induces choirmasters to train boys with clear head-tones, even registers, and clear articulation. Many other excellent works dealing with the theory of music, the physiological side of voice-production, and exercises for producing facility, etc., are in existence and may easily be obtained, if one wishes to pursue the study of voiceproduction further. Should this desire be awakened in anyone, this little work will not have been written in vain.