We were at Merlin's exhibition in the morning and Dillon's exhibition of philosophical fireworks in the evening. During the intervals Mr. Cartwright performs on the musical glasses, the sounds on [sic] which are most harmonious, whilst Mr. Dillon lights up an aërostatic branch suspended from the cupola of the saloon, in which light is produced in an instant of time, which Mr. Dillon carries at will, and extinguishes in an instant; wonderfully pretty.