Unpublished manuscript, 'Dissertazione su di un nuovo ritrovato, per corregere le alterazioni, che produce l'aria negli orologi da sacca' ['Essay on a new invention to correct alterations produced by air in pocket watches'] by Tomaso Felicetti Paper by Felicetti concerning proposed improvements in the design of pocket watches seeking to minimise the effect of air trapped inside the watch on the watch's motion. A slip of paper pasted onto the final page reads 'Mr [Alexander] Aubert lookd them over but did not approve of them'. Subject: Watchmaking / Engineering Written by Felicetti in Napoli [Naples, Italy]. 28 June 1789