Transcriber’s Note.

The following amendments have been made to the original text:

[Page 24]: “and were the forerunners of the opera and oratorio”
for “and were the fore-/runners of the opera and oratorio”
[Page 26]: “But in that brilliant springtime of vocal art”
for “But in that brilliant spring-/time of vocal art”
[Page 30]: “i. e., the old singing masters taught”
No comma in original (added for consistency).
[Page 42]: “by their anterior apophyses, without leaving any space”
Comma missing from original.
[Page 48]: “vol. x. 4th Series, pp. 218–221, 1855.”
for “vol. x. 4th Series, p. 218–221, 1855.”
[Page 66]: “i. e., those tones where a different action”
No comma in original (added for consistency).
[Page 79]: “the tones of the head register.”
Period missing from original.
[Page 87]: “the reed of the mouthpiece.”
for “the reed of the mouth-/piece.”
[Page 108]: “the air coming from the lungs through the trachea,”
for “the air coming from the lungs through the treachea,”
[Page 118]: “then the high inharmonic over-tones are prominent,”
for “then the high inharmonic overtones are prominent,”
[Page 132]:
for (compare fourth note)
[Footnote 18]: “struggle to establish the unity of the fatherland.”
for “struggle to establish the unity of the father-/land.”

TENOR VOICE	First series of the chest register.	Second series.	First series of the falsetto.
	G A B c d e f g a	b c¹ d¹ e¹ f¹	g¹ a¹, &c.
C D E F	G A B c d e f g a	b c¹ d¹ e¹ f¹
First series of the chest register.		Second series.	BASS VOICE

First series of the chest register.	Second series of the chest register.	First series of the falsetto register.	Second series of the falsetto register.	Head register.
e f g a b c¹	d¹ e¹ f¹	g¹ a¹ b¹ c²	d² e² f²	g² a² b² c³ d³ e³ f³