AA Natural Magick. BooJ^ 19.

and be heard at the other end, as they came from the speakers month ; wherefore ifthat voice goes with time,8c hold entire,if any man as the words are spoken (hall Wopthe end of the Pipe,and he that is at the other end shall do the like,the voice may beintercepted in the middle, and be shut up as in a prison; and when the mouth isopened, the voice will come forth, as out of his mouth that spake it: but becausesuch long Pipes cannot be made without trouble, they may be bent up and downlike a Trumpet, that a long Pipe maybe kept in a small place; and when the mouthis open , the words may be understood. I am now upon trial of it: if before myBook be Printed the business cake effect, I will set it down 5 if not, if God please, Ishall write of it elsewhere.

Chap. II.

Of Instruments Mustcal made with water.

O Ld Water-lnftrumenrs were of great esteem, but in our days the use is worn 'out: Yer we read that Ifero took such delight in them, that when his Life andEmpire were in danger, amongst the seditions of Souldiers and Commanders, andall was in imminent danger , he would not forsake the care of them, and pleasurehe took in them. Vitruviut teacheth us how they were made, but so obscurely andmystically, that what he says is very little understood. I have tryedthis by manyand sundry ways, by mingling air with water, which placing in the end of a Pipe, or 'in my mouth, where the breath of the mouth strikes against the air; and thoughthis made a pleasant noise, yet it kept no tune: For whilst the water bubbles, andtrembles or warbles like a Nicingale, the voice is changed in divers tunes, onenote is sweet and pleasant, two, squele and jar. But this way it will make a war-bling found, and keep the tune. Let there be made a Brass bottom’d Chest for theOrgan, wherein the wind must be carried. let it be half full of water, lec the windbe made by bellows , or some such way that must run through a neck under the wa-ters ; bur the spirit that breaks forth of the middle of the water, is excluded into theempty place: when therefore by touching of the keys, the stops of the mouths ofthe Pipes are opened, the trembling wind coming into the Pipes,makes very pleasanttrembling sounds, which I have tried and found to be true.

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Chap. III.

Of some Experiments bj Wind-Instruments,

N Ow will I proceed to the like Wind-Instruments , but of divers forts that ariseby reason of the air, and I shall thew how it is dilated, contracted, rirified byfire,condensed by cold. If you will

'That a vessel turned downwards [ball draw in the water,do thus: Make a vessel with a very long neck • the longer it is, the greater wonder itwill seem to be: Let it be of transparent Glass, that you may see the water runningup; fill this with boiling wat^r, and when it is very hot, or setting the bottom ofit to the fire , that it may not presently wax cold, the mouth being turned down-ward? ibx k a-vy touch the water, it will suck ic all in. So such as search out the aa-Cutt of things fay, That by the Sun beams the water is drawn up, from the Concaveplaces of the Earth to the tops of Mountains, whence fountains come forth. Andno small Arts arise from hence,for Wind-Instruments, as Heron affirms. Vstruviuispraks the like concerning the original of Winds: but now it is come to be used forhouses. For so may be made

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A vejfelto cast forth wind.

You may snake Brass Bowles,, or of some other matter: let them be hollow, »ndround, with a very small,hole inxhe middle, that the water is put in at : if this be

hard,