Note 241 — SPEAKING-TRUMPET.
William Johnston translation
Our Kircher, in his Phonurgia, justly claims that invention, as it was several years ago exhibited by him in the Jesuits’ college at Rome, and an account of it printed. That this is true I myself was an eye-witness; though I must acknowledge that no one before the above-mentioned Englishman ever applied this speaking instrument, at least in so perfect a manner, to that use for which it was afterwards employed.—Magisterium Naturæ et Artis. Brixiæ, 1684–92, fol. ii. p. 436.