[12] Register; a Term taken from the different Stops of an Organ.
[13] The Pitch of Lombardy or Venice, is something more than half a Tone higher than at Rome.
[14] A Messa di Voce is the holding out and swelling a Note. Vide [Pl. I.] Numb. 4. This being a Term of Art, it is necessary to use it, as well as Piano for soft, and Forte for loud. N.B. Our Author recommends here to use any Grace sparingly, which he does in several other Places, and with Reason; for the finest Grace too often repeated grows tiresome.
[15] See for Appoggiatura in the next Chapter.
[16] This Chapter contains some Enquiries into Matters of Curiosity, and demands a little Attention. The Reader therefore is desired to postpone it to the last.
[17] Appoggiatura is a Word to which the English Language has not an Equivalent; it is a Note added by the Singer, for the arriving more gracefully to the following Note, either in rising or falling, as is shewn by the Examples in Notes of Musick, [Pl. II.] Numb. 2. The French express it by two different Terms, Port de Voix and Appuyer; as the English do by a Prepare and a Lead. The Word Appoggiatura is derived from Appoggiare to lean on. In this Sense, you lean on the first to arrive at the Note intended, rising or falling; and you dwell longer on the Preparation, than the Note for which the Preparation is made, and according to the Value of the Note. The same in a Preparation to a Shake, or a Beat from the Note below. No Appoggiatura can be made at the Beginning of a Piece; there must be a Note preceding, from whence it leads.
[18] Here begins the Examination of the Semitones Major and Minor, which he promised in § 15. Ch. 1. It may be of Satisfaction to the Studious, to set this Matter at once in a true Light; by which our Author's Doubts will be cleared, and his Reasoning the easier understood. A Semitone Major changes Name, Line, and Space: A Semitone Minor changes neither. [Pl. II.] Numb. 1. To a Semitone Major one can go with a Rise or a Fall distinctly; to a Semitone Minor one cannot N.B. From a Tone Minor the Appoggiatura is better and easier than from a Tone Major.
[19] These are all Tones Major and Minor, and Semitones Major. [Pl. II.] Numb. 2.