Note 8 — III PHYSICAL VIEW FORMATION OF SOUNDS BY THE VOCAL ORGAN
William Henry Furness translation
The concert pitch in different places and at different periods has undergone great changes. The Grand Opera in Paris in the year 1700 established 404 vibrations to a second as the concert pitch of a1, which gradually rose higher, as the wind instruments became more perfect and had a more important part assigned them in concerted music, until 1858 it had attained the height of 448 vibrations in a second. In this same year (1858) at Berlin and St. Petersburg it reached its greatest height—451½ vibrations in the second. In Mozart’s time, in Vienna, it had only 422 and 428 vibrations.
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