fillip upon the brim or outside; and after empty | ancients, that an empty barrel knocked upon with part of the water, and so more and more, and still the finger, giveth a diapason to the sound of the try the tone by fillipping; you shall find the tone like barrel full; but how that should be, I do not fall and be more base, as the glass is more well understand; for that the knocking of a barrel, empty. full or empty, doth scarce give any tone.

187. There is required some sensible difference

Experiments in consort touching the proportion of in the proportion of creating a note, towards the

treble and base tones.

Experiments in consort touching exterior and interior sounds.

sound itself, which is passive: and that it be not The just and measured proportion of the air too near, but at a distance. For in a recorder, the percussed, towards the baseness or trebleness of three uppermost holes yield one tone; which is a tones, is one of the greatest secrets in the con-note lower than the tone of the first three. And templation of sounds. For it discovereth the the like, no doubt, is required in the winding or true coincidence of tones into diapasons; which stopping of strings. is the return of the same sound. And so of the concords and discords between the unison and diapason, which we have touched before in the experiments of music; but think fit to resume it here as a principal part of our inquiry touching the nature of sounds. It may be found out in the proportion of the winding of strings; in the proportion of the distance of frets, and in the proportion of the concave of pipes, &c., but most commodiously in the last of these.

There is another difference of sounds, which we will call exterior and interior. It is not soft nor loud: nor it is not base nor treble: nor it is not musical nor immusical: though it be true, that there can be no tone in an interior sound; but on the other side, in an exterior sound there may be both musical and immusical. We shall 184. Try therefore the winding of a string therefore enumerate them, rather than precisely once about, as soon as it is brought to that exten-distinguish them; though, to make some adumsion as will give a tone; and then of twice about, and thrice about, &c., and mark the scale or difference of the rise of the tone: whereby you shall discover, in one, two effects; both the proportion of the sound towards the dimension of the winding; and the proportion likewise of the sound towards the string, as it is more or less strained. But note that to measure this, the way will be, to take the length in a right line of the string, upon any winding about of the peg.

185. As for the stops, you are to take the number of frets; and principally the length of the line, from the first stop of the string, unto such a stop as shall produce a diapason to the former stop upon the same string.

186. But it will best, as it is said, appear in the bores of wind instruments: and therefore cause some half dozen pipes to be made, in length and all things else alike, with a single, double, and so on to a sextuple bore; and so mark what fall of tone every one giveth. But still in these three last instances, you must diligently observe, what length of string, or distance of stop, or concave of air, maketh what rise of sound. As in the last of these, which, as we said, is that which giveth the aptest demonstration, you must set down what increase of concave goeth to the making of a note higher; and what of two notes; and what of three notes; and so up to the diapason: for then the great secret of numbers and proportions will appear. It is not unlike that those that make recorders, &c., know this already for that they make them in sets: and likewise bell-founders, in fitting the tune of their bells. So that inquiry may save trial. Surely it hath been observed by one of the

bration of what we mean, the interior is rather an impulsion or contusion of the air, than an elision or section of the same: so as the percussion of the one towards the other differeth, as a blow differeth from a cut.

188. In speech of man, the whispering, which they call "susurrus” in Latin, whether it be louder or softer, is an interior sound; but the speaking out is an exterior sound; and therefore you can never make a tone nor sing in whispering; but in speech you may: so breathing, or blowing by the mouth, bellows, or wind, though loud, is an inte rior sound; but the blowing through a pipe or concave, though soft, is an exterior. So likewise the greatest winds, if they have no coarctation, or blow not hollow, give an interior sound; the whistling or hollow wind yieldeth a singing, or exterior sound; the former being pent by some other body; the latter being pent in by its own density: and therefore we see, that when the wind bloweth hollow, it is a sign of rain. The flame, as it moveth within in itself or is blown by a bellows, giveth a murmur or interior sound.

189. There is no hard body, but struck against another hard body, will yield an exterior sound; greater or lesser: insomuch as if the percussion be over-soft, it may induce a nullity of sound; but never an interior sound; as when one treadeth so softly that he is not heard.

190. Where the air is the percutient, pent or not pent, against a hard body, it never giveth an exterior sound; as if you blow strongly with a bellows against a wall.

191. Sounds, both exterior and interior, may be made as well by suction as by emission of the breath; as in whistling or breathing.

Experiments in consort touching articulation of I will refer them over, and place them amongst the

sounds.

experiments of speech. The Hebrews have been diligent in it, and have assigned which letters are labial, which dental, which guttural, &c. As for the Latins and Grecians, they have distinguished between semi-vowels and mutes; and in mutes between "mutæ tenues, mediæ," and "aspiratæ ;"

192. It is evident, and it is one of the strangest secrets in sounds, that the whole sound is not in the whole air only; but the whole sound is also in every small part of the air. So that all the curious diversity of articulate sounds, of the voice of man or birds, will enter at a small cranny incon-not amiss, but yet not diligently enough. For the fused.

193. The unequal agitation of the winds and the like, though they be material to the carriage of the sounds farther or less way; yet they do not confound the articulation of them at all, within that distance that they can be heard; though it may be, they make them to be heard less way than in a still as hath been partly touched. 194. Over great distance confoundeth the articulation of sounds; as we see, that you may hear the sound of a preacher's voice, or the like, when you cannot distinguish what he saith. And one articulate sound will confound another, as when many speak at once.

195. In the experiment of speaking under water, when the voice is reduced to such an extreme exility, yet the articulate sounds, which are the words, are not confounded, as hath been said.

special strokes and motions that create those sounds, they have little inquired: as, that the letters B, P, F, M, are not expressed, but with the contracting or shutting of the mouth; that the letters A and B cannot be pronounced but that the letter N will turn into M; as "hecatonba" will be "hecatomba." That Mand T cannot be pronounced together, but P will come between; as "emtus" is pronounced "emptus ;" and a number of the like. So that if you inquire to the full, you will find, that to the making of the whole alphabet there will be fewer simple motions required than there are letters.

199. The lungs are the most spungy part of the body; and therefore ablest to contract and dilate itself: and where it contracteth itself, it expelleth the air; which, through the artery, throat, and mouth, maketh the voice: but yet articulation is not made but with the help of the tongue, palate, and the rest of those they call instruments of voice.

196. I conceive, that an extreme small or an extreme great sound cannot be articulate; but that the articulation requireth a mediocrity of sound: for that the extreme small sound confoundeth the articulation by contracting; and the great sound by dispersing: and although, as was formerly said, a sound articulate, already created, will be contracted into a small cranny; yet the first articulado allude unto the articulate letters; as trembling tion requireth more dimension.

197. It hath been observed, that in a room, or in a chapel, vaulted below and vaulted likewise in the roof, a preacher cannot be heard so well as in the like places, not so vaulted. The cause is, for that the subsequent words come on before the precedent words vanish: and therefore the articulate sounds are more confused, though the gross of the sound be greater.

198. The motions of the tongue, lips, throat, palate, &c., which go to the making of the several alphabetical letters, are worthy inquiry, and pertinent to the present inquisition of sounds: but because they are subtle, and long to describe, we

200. There is found a similitude between the sound that is made by inanimate bodies, or by animate bodies that have no voice articulate, and divers letters of articulate voices: and commonly men have given such names to those sounds as

of water hath resemblance with the letter L; quenching of hot metals with the letter Z; snarling of dogs with the letter R; the noise of screechowls with the letter Sh; voice of cats with the diphthong Eu; voice of cuckoos with the diphthong Ou; sounds of strings with the letter Ng; so that if a man, for curiosity or strangeness' sake, would make a puppet or other dead body to pronounce a word, let him consider, on the one part, the motion of the instruments of voice; and on the other part, the like sounds made in inanimate bodies; and what conformity there is that causeth the similitude of sounds; and by that he may minister light to that effect.

CENTURY III.

Experiments in consort touching the motion of 206. But to make an exact trial of it, let a man sounds, in what lines they are circular, oblique, stand in a chamber not much above the ground, straight, upwards, downwards, forwards, back-and speak out at the window, through a trunk, to wards. one standing on the ground, as softly as he can,

201. ALL sounds whatsoever move round; that the other laying his ear close to the trunk; then is to say, on all sides: upwards, downwards," via versa," let the other speak below, keeping forwards, and backwards. This appeareth in all the same proportion of softness; and let him in instances. the chamber lay his ear to the trunk: and this may be the aptest means to make a judgment, whether sounds descend or ascend better.

202. Sounds do not require to be conveyed to the sense in a right line, as visibles do, but may be arched; though it be true they move strongest in a right line; which nevertheless is not caused by the rightness of the line, but by the shortness of the distance; "linea recta brevissima." And therefore we see if a wall be between, and you speak on the one side, you hear it on the other; which is not because the sound passeth through the wall, but archeth over the wall.

203. If the sound be stopped and repercussed, it cometh about on the other side in an oblique line. So, if in a coach one side of the boot be down, and the other up, and a beggar beg on the close side; you will think that he were on the open side. So likewise, if a bell or clock be, for example, on the north side of a chamber, and the window of that chamber be upon the south; he that is in the chamber will think the sound came from the south.

Experiments in consort touching the lasting and perishing of sounds; and touching the time they require to their generation or delation.

207. After that sound is created, which is in a moment, we find it continueth some small time, melting by little and little. In this there is a wonderful error amongst men, who take this to be a continuance of the first sound; whereas, in truth, it is a renovation, and not a continuance; for the body percussed hath, by reason of the percussion, a trepidation wrought in the minute. parts, and so reneweth the percussion of the air. This appeareth manifestly, because that the melting sound of a bell, or of a string strucken, which is thought to be a continuance, ceaseth as soon as> the bell or string are touched. As in a virginal, as soon as ever the jack falleth, and toucheth the string, the sound ceaseth; and in a bell, after you have chimed upon it, if you touch the bell the

204. Sounds, though they spread round, so that there is an orb or spherical area of the sound, yet they move strongest, and go farthest in the fore-sound ceaseth. And in this you must distinguish lines, from the first local impulsion of the air. And therefore, in preaching, you shall hear the preacher's voice better before the pulpit than behind it, or on the sides, though it stand open. So a harquebuss, or ordnance, will be farther heard forwards from the mouth of the piece, than backwards, or on the sides.

205. It may be doubted, that sounds do move better downwards than upwards. Pulpits are placed high above the people. And when the ancient generals spake to their armies, they had ever a mount of turf cast up, whereupon they stood; but this may be imputed to the stops and obstacles which the voice meeteth with, when one speaketh upon the level. But there seemeth to be more in it; for it may be that spiritual species, both of things visible and sounds, do move better downwards than upwards. It is a strange thing, that to men standing below on the ground, those that be on the top of Paul's seem much less than they are, and cannot be known; but to men above, those below seem nothing so much lessened, and may be known: yet it is true, that all things to them above seem also somewhat contracted, and better collected into figures: as knots in gardens show best from an upper window or terrace.

that there are two trepidations: the one manifest and local; as of the bell when it is pensile: the other secret, of the minute parts; such as is described in the ninth instance. But it is true, that the local helpeth the secret greatly. We see likewise that in pipes, and other wind instruments, the sound lasteth no longer than the breath bloweth. It is true, that in organs there is a confused murmur for a while after you have played; but that is but while the bellows are in falling.

208. It is certain, that in the noise of great ordnance, where many are shot off together, the sound will be carried, at the least, twenty miles upon the land, and much farther upon the water. But then it will come to the ear, not in the instant of the shooting off, but it will come an hour or more later. This must needs be a continuance of the first sound; for there is no trepidation which should renew it. And the touching of the ordnance would not extinguish the sound the sooner: so that in great sounds the continuance is more than momentary.

209. To try exactly the time wherein sound is delated, let a man stand in a steeple, and have with him a taper; and let some veil be put before the taper; and let another man stand in a field a

Experiments in consort touching the passage and it may be, may pass through small crannies not