Prepare a cestern having divers partitions, one above another; let them all have cranes in the bottoms to carry the water from one to another; also let each cestern have his severall pipe, all of them coming out at the top of the cestern, on whose tops let birds bee artificially made, with reeds in them: also in the top of the upper cestern let there bee a tunnell. Place it under the fall of a conduit of water, and you shall heare so many severall voyces as there are birds. [Illustration] _A device whereby the figure of a man standing on a basis shall be made to sound a trumpet._ Prepare a cestern having within on the lid fastned a concave hemisphere, in whose bottom let there bee made one or two holes: let there also be a hole in the top of the sayd cestern, whereby it may bee filled with water as occasion serveth. Also let there bee made to stand on the top of this cestern the image of a man holding unto his mouth a trumpet: this image must likewise have a slender pipe coming out of the cestern unto the trumpet, in this pipe or cane there must be a cock, nigh unto the cestern. Also there must come out of the concave hemisphere at the side of the cestern, a little short pipe, having a clack on it within the vessell. Fill the cestern about two thirds full of water, and then cork it up fast, blow then into the vessell at the pipe on the side divers times, and the ayer will force the water out of the hemisphere, and make it rise up on the sides of it; turne then the cock, and the weight of the water will force the ayer out of the pipe, and so cause the trumpet to sound. [Illustration] _Hercules shooting at a Dragon, who as soone as he hath shot, hisseth at him._ Let there be a cestern having a partition in the midst, in the partition let there bee a deep succur, having a small rope fastned unto the top of it: let the one end of the rope come out of the upper lid of the cestern, and bee fastned unto a ball, the other part thereof let it be put under a pulley (fastned in the partition) and let it be carried also out of the upper cestern, and be fastned unto the arme of the image, which must bee made to slip to and againe, and to take hold of the string of a steele bow that is held in the other hand. At the other end of the cestern let there bee made an artificiall image of a Dragon, through whose body must come a small pipe with a reed artificially fastned in the upper part thereof. Note then, that when you put up the ball, the image will draw his bow, and when you let it fall, the Dragon will hisse. [Illustration] _Experiments of producing sounds by evaporation of water by ayer._ Prepare a round vessell of brasse, or latin, having a crooked pipe or neck, whereto fasten a pipe: put this vessell upon a trevet over the fire, and it will make a shrill whistling noyse. [Illustration]