96 



CONSENTS OF THE CATALOGU^E. 



Page 



Pneumatic Machines and Apparatus, connected with Hydraulics 254 



Bellows and Gasholders 254 



Submarine Apparatus 255 



Pneumatic Machines connected with Heat 256 



Aerostation, either by heated Air or by Gases 256 



Ventilation by Heat 257 



Steam Engine 257 



Steam Air Pump 259 



[nflammable Vapours 259 



Gunner}' 259 



Theory of Gunnery, and Operation of fowder 259 



Particular Constructions of Guns and their Parts - 262 



Kockets and other Fireworks 263 



History of Hydraulics and Pneumatics 263 



[Particular Dates 263 



Acustics. Sound in General , 264 



Propagation of Sound 264 



Decay of Sound 266 



Echos 266 



Sources of Sound 266 



Vibrations of Fluida 266 



Vibrations of Solids 267 



V ibrations from Tension 267 



Chords 267 



Surfaces 268 



Vibrations from Elasticity 268 



Lateral Vibrations 268 



Longitudinal Vibrations 269 



Spirtd Vibrations 269 



Effects of Sound 269 



Sympathetic Sounds 270 



Ear and Hearing. Instruments for Hearing 271 



Theory of Music 272 



Musical Instruments 274 



Stringed Instruments 274 



Drimis - 274 



Elastic Instruments 274 



Wind Inslruments 275 



Voice and Speech 275 



Organs of the Human Voice 275 



Speech 275 



A Description of Articulate Sounds, with appropriate 



Characters 276 

 [Examples, with the Mode of Writing the Words 



I in these Characters 277 



Teaching the Deaf 278 



Peculiarities of Speech ' 278 



Speaking Trumpet 279 



Voices of different Animals 279 



Instruments subservient to Music 279 



History of Acustics 279 



Optics in General 280 



