TO IMITATE THE CRASH OF A THUNDERBOLT STRIKING.
Fig. 109.
It may have happened to you to have been present when a servant’s awkwardness has let a Venetian blind come down by the “run,” when you surely cannot have failed to notice the terrific noise resulting. By a similar fall of slats, of which the sudden contact gives a number of sharp clatters, blended by the rapidity of their succession into one crash, the semblance of a thunderbolt’s fall is given.
A A, stout iron rods, to which is fastened, at the lower ends, a board C; they rise perpendicularly, and are fastened above, being about 10 feet in length. B B are ropes, to which, at E E, are fastened firmly the slats D D (of which but two are represented, but there are as many as will cover the whole space enclosed in the rods, set 6 or 10 inches apart). These slats slide freely up and down the rods. The ropes, when drawn up taut, retain the slats apart, but, on being released, the slats fall, each striking the under one, and all coming down on C with a fearful crash.