Artificial Rain And Hail
Make a hollow cylinder of wood; let it be very thin at the sides,
about eight or ten inches wide, and two or three feet diameter. Divide
its inside into five equal parts, by boards of five or six inches
wide, and let there be between them and the wooden circle, a space of
about one-sixth of an inch. You are to place these boards obliquely.
In this cylinder put four or five pounds of shot that will easily pass
through the opening. When turned upside down, the noise of the shot
going through the various partitions will resemble rain; and if you
put large shot, it will produce the sound of hail.