3^aturall Hiflory: 



Experiments 

 [Confort cou- 

 ching Motion 

 of Bodies 

 upon their 

 Preffure. 



9 



Salted throughout) goethtothe Bottome. And therefore no marvel], if 

 the Drayning of water by defcent, doth make it frefti: Befides, I do 

 fomewhat doubt, that the very Dailiing of the water, that cometh from 

 the Sea, is more proper to ftrike off the Salt part, than where the water fli- 

 deth of her own Motion. 



. Itfeemeth Percolation or T ranfmiflion> (which is commonly called Strain- 

 ing) is a good kind of Separation, Not only of Thick from Thin, a^d 

 ' Grofsfrom Fine But of more fubtile Natures j And varieth according to 

 the Body through which the T ranjmijjion is made. As if through a woollen 

 Bag,the Liquor leaveth the Fatnefs If through Sand, the Saknefs, &c. j 

 They fpeak of Severing Wine from Water •, palfing it through I vie wood, [ 

 or through other the like porous Body .but Non conflat. 



Thecal of Trees (which we fee to be commonly mining and clear) 

 is but a fine Pallageor framing of the juyce of the Tree, through the 

 Wood and Bark. And in like manner, Cormf) Diamonds^ and Rock Rubie s, 

 (which are yet more refplendent than Gums) are the fine Exudations of 

 Stone. 



Arifotle giveththe Caufe, vainly, why the Feathers of Birds are of more 

 lively Colours, than the Haues of Beafis tor no Beaft hath any fine Azure, 

 or Carnation, or Green Baire. He iaith, it is, becaufe Birds are more in 

 the Beames of the Sun, than Be aft s but that is manifeftly untrue ^ For 

 Cattle are more in the Sun than Birds, that, live commonly in the Woods, 

 or in fome Covert. The true Caufe is,that the excrementitious Moifture of 

 living Creatures, which maketh as well the Feathers in Birds, as the Haire 'm 

 £<^,paffeth in Birds through a finer and more delicate Strainer,than it doth 

 in Beafs:~Fox Feathers pafs through Quills,And Haire through Skin. 



The' Clarifying of Liquors by Adhefion is an Inward Percolation And is 

 effected, when tome Cleaving Body is Mixed and Agitated with the Li- 

 quors whereby the grolfer part of the Liquor flicks to that Cleaving Body 

 And fo the finer Parts are freed from the Crofter. So the Apothecaries cla- 

 rifie their Syrup by whites of Eggs, beaten with the Juice9 which they 

 would clanfie •, which whites of Eggs gather all the Dregs and grolTer Parts 

 of the Juyce to them h And after the Spuf being let on the Fire, the whites 

 of Eggs themfelves harden, and are taken forth. So Ippocrafs is clarified 

 by mixing with Milk-, And ftirring it about, And then palling it through 

 a WoollenBag, which they call Biffocrates Sleeve, And the Cleaving Na- 

 ture of the Milk draweth the Powder of the Spices, and grolTer parts of the 

 Liquor to it-,and in the pallage they ftick upon the Woollen bag. 



The Clarifying oi Water, is an Experiment tending to Health • befides the 

 pleafure of the Eie, whenw^^isCryftaline. It is effected by calling in 

 and placing Pebbles, at the Head of a Current that the water may ltrain 

 through them. 



It may be, Percolation doth not only caufe Clearnefs and Splendour, 

 but Sweetnefs of Savour For that alfo followeth, as well as Clearnefs, 

 when the Finer Parts are levered from the Groiler. So it is found, that the 

 Sweats of Men that have much Heat, and exerafe much, and have clean 

 Bodies, and fine Skins, do fmell fweet As was faid of Alexander And 

 we fee,commonly,that Gums have fweet Odours. 



TAke a Glafs, and put Water into it, and wet your Finger, and draw it 

 round about the Lap of the Glafs, prefling it fqmewhat hard And af- 

 ter you have drawn it fomefew times about, it will make the Water friske 



and 



