ACOUSTICS.] 



INDEX TO VOL. I. 



1227 



SECTION V. ACOUSTICS. 



ACOUSTIC effects in buildings, 293. 



Acoustic figures, 297. 



Acoustics, 275. 



Acoustics, practical, 295. 



jEolian harp, the, 276. 



Air, density of, as affecting vibrations, 276. 



Analogy between sound, light, and beat, 



275. 



Animal sounds, 279. 

 Animals, voice of, 289, et leg. (See 



name of each animal). 

 Apes, voice of, 290. 

 Ass, bray of the, 290. 

 Automatic sounds, 283. 



BIRDS, larynx of, 292. 



Birds of prey, voice of, 293. 



Birds, voice of, 291 (See name of each 



bird). 

 Buildings, acoustic properties of, 295. 



CANAL, oral, the, 287. 



Cat, voice of, 290. 



Chimpanzee, voice of, 290. 



Churches, acoustic construction of, 205. 



Cockatoo, voice of, 294. 



Concert-rooms, construction of, 296. 



< mrert, the Telephonic, 277. 



Uiction of sound, 276. 

 ( .induction of sound by air, 276. 

 Conduction of sound by gases, 276, 

 Conduction of sound by solids, 276. 

 Conduction of sound, rpeed of, 276. 

 Consonants, pronunciation of, 288. 

 Cords, vocal, 286. 

 Cornopean, the, 279. 

 Cricket, chirp of, 294. 

 Crocodile, voice of, 294. 

 Cuckoo, voice of, 294. 

 Curved reflection of sound, 277. 

 Curved walls in buildings, 2 ( Jl . 



DEAF and dumb, education of the, 289. 



Deaf-mutes, 289. 



Diffusion of sound, 276, 279. 



Dove, voice of, 294. 



Drum of the oar, the, 297. 



Dull sounds, 279. 



Dumbness, 2.S9. 



Dumb, teaching the, to speak, 289. 



EAR, description of the, 297. 



Ear, the human, 297. 



Echoes, 277. 



Echoes in buildings, 297. 



Elastic bodies, vibrations of, 275. 



Elephant, voice of, 290. 



Kustachian tube, the, 282, 297. 



FIGURES, acoustic, 297. 

 Fi-lies, sounds of, 294. 

 Flute, the, 279. 

 Fly, humming of, 295. 

 Frog, croak of, 294. 



GIBBONS, voice of, 299. 

 Glasses, musical, 27.~>, 276. 

 Glottis, the, 282. 

 Gong, sound of a, 276. 

 Grasshopper, chirp of, 291. 



HAI.I.S, acoustic construction of, 295. 

 Hearing-trum|>et, the, 277. 

 Hog, grunt of the, 290. 

 Horse, neigh of the, 290. 



INSECTS, humming of, 295. 



Insects, sound of, 294 (See name of each). 



Instruments, musical, 279. 



Interference of sound, 296. 



Invisible lady, the, 278. 



JACKDA-W, voice of, 293. 

 Jay, voice of, 294. 



KANGAROO, voice of, 290. 



LARYNX, experiments on the, 2S1. 



Larynx, the, 280. 



Length of musical strings, ratio of, 279. 



Ligaments, vocal, 280. 



Light, speed of, 276. 



Lion, roar of, 290. 



Literal bounds, 283. 



MAGPIE, voice of, 294. 



Mammals, their organs of voice, 2S9 



et eq. 



Monkeys, voice of, 290. 

 Musical boxes, 276. 

 Musical glasses, 275, 276. 

 Musical instruments, manufacture of, 279. 

 Musical sounds, the cause of, 275, 278. 



NASAL sounds, 288. 

 Note, intensity, &c., of a, 2SG. 

 Note of a room, 296. 

 Notes, musical, 278. 

 Nuthatch, voice of, 204. 



OCTAVE, the musical, 278. 

 Optic nerve, the, 297. 

 Oral canal, the, 287. 

 Organs, vocal, of birds, 292. 

 Organs, vocal, of mammals, 259. 

 Organs, vocal, of man, 2,-U. 



PARROT, voice of, 294. 



Percussion produces sound, 275. 



Pianoforte-strings, 278. 



Pigeon, voice of, 294. 



Physiology, comparative, of voice, 289. 



Practical acoustics, 295. 



Production of sound, 275. 



Pronunciation of consonants, 238. 



Pronunciation of vowels, 287. 



Public speaking, 295. 



QUADRUHANA, voice of, 290. 



RAVEN, voice of, 293. 



Ray of sound, 277. 



Reed instruments, 283. 



Reflection of sound, the curved, 277. 



Reflectors of sound, 277. 



Reptiles, voice of, 294 (Sec also names 



of each). 



Rocks, conducting power of, 277. 

 Roofs reflecting sounds, 290. 

 Rooks, voice of, 293. 

 Room, each has its peculiar note, 296. 



SENSORIUM of the brain, 297. 



Serpents, hiss of, 294. 



Shrill sounds, 279. 



Singers, arrangement of, in an orchestra, 



ne. 



Singing, 285. 



Singing-birds, voice of, 292. 

 Song of the blarkbirJ, 293. 

 Song of the bullfinch, 293. 

 Song of the canary, 293. 

 Song of the chaffinch, 293. 

 Song of the goldfinch, 293. 

 Song of the linnet, 293. 

 Song of the nightingale, 293. 

 Song of the skylark, 292. 

 Song of the thrush, 293. 

 Song of the woodlark, 203. 

 Sound a radial force, 295. 

 Sound, conduction of, 276. 

 Sound, diffusion of, 276, 279. 

 Sound in a vacuum, 277. 



Sound, interference of, 296. 

 Sound, musical, production of, 278. 

 Sound, production of, 275. 

 Sound produced by the automaton, 2SS. 

 Souud produced by vibration, 275. 

 Sound, rate of travelling of, 276. 

 Sound, reflection of, 277. 

 Sounding-board of stringed instruments, 



276, 279. 



Sounding-board, use of, 297. 

 Sounds of telegraph wires, 276. 

 Speaking, rules for public, 290. 

 Speaking-trumpet, the, 277. 

 Speaking-tubes, 278. 

 Speech, human, 279, 287. 

 Speech, organs of, 280, 287. 

 Stammering, 288. 

 Stammering, cure of, 289. 

 Stethoscope, the, 276. 

 Strings, length of, producing notes, 279. 



TELEGRAPH wires, sounds of, 276. 



Telephonic concert, 277. 



Theatres, acoustic construction of, 295. 



Tiger, voice of, 290. 



Tone, flexibility of, 279. 



Treble clef, 279. 



Tuning-fork, the, 275. 



Turtle-dove, voice of, 294. 



Tympanum, the, 297. 



UNISON, effect of sounds in, 297. 



VACUUM, sound in a, 277. 



Ventriloquism, 288. 



Vibration of bodies produces sound, 275. 



Vibration of steel producing sound, 278. 



Vibrations, number of per second, 279. 



Vibrations of the atmosphere, 276. 



Vibrations producing notes, number of, 

 in strings, 279. 



Vibrations, ratio of, 279. 



Violin, the, 279. 



Vocal cords, tension of, 286. 



Vocal ligaments, 280. 



Voice, alto, 235. 



Voice, baritone, 285. 



Voice, bass, 285. 



Voice, causes of the human, 280. 



Voice, comparative physiology of, 289. 



Voice, comparison of male and female, 



285. 



Voice, compass of, 284, 285. 

 Voice, contralto, 285. 

 Voice, effects of climate on, 286. 

 Voice, falsetto, 286. 

 Voice, human, 279, el teq. 

 Voice, mezzo-soprano, 235. 

 Voice of birds, 291 , et leg. (See name of 



each bird : also " Song"). 

 Voice of mammals, 289, et teg. 

 Voice of the horse, 290. 

 Voice of the mule, 290. 

 Voice, organs of, 279, et aeq. 

 Voice, organs of, in birds, 291. 

 Voice, pitch of, 284, 286. 

 Voice, production of, 283. 

 Voice, soprano, 285. 

 Voice, tenor, 285. 

 Vowels, pronunciation of, 237. 



WALLS reflecting sound, 296. 

 Water, conducting power of, 276. 

 Waves of sound, 277. 

 Whispering-galleryia St. Paul's Cathedral, 



277. 



Whistling, 286. 



Wind instruments, sound of, 276. 

 Wind-pipe, the, 280. 

 Woodpecker, voice of, 294. 

 Wryneck, voice of, 294. 



