184 



Experiment 

 Solitary tou- 

 ching the Na- 

 ture of Aire. 



266 



Experiment in 

 Confortj tou- 

 ching the Eye s : 

 and Sight. 

 867 



269 



870 



871 



3\(jtwaU Hifiory : j 



no Imbibition. And therefore , Oile likewife lyeth at the Top of the Watery 

 without Com-mixture: And sl Drop o{ jvater, running fwiftly over a Strove, 

 Smooth Body, wetteth not. 



or 



C far -re- Light Nights , yea, and bright Moon-fhine Nights , are Colder than 

 Cloudy Nights. The Crf#/<? is, the Drinef and Fmenefs" of the y4/V* , which 

 thereby becommeth more Piercing,and Sharp: And therefore Great Conti- 

 nents are colder than I/lands : And as for the Moon, though it felfe inclineth 

 the Aire to Moifiure, yet when it fhineth bright,it argueth the Aire is drie. 

 Alfo Clofe Aire, is warmer than Open Aire-, which (it may be) is , for that 

 the true Caufe of Ccld,is an Expiration from the Globe of the Earth which in 

 open Places is ftronger ; And again , Aire it felfe , if it be not altered by 

 that Expirations^ not without fome Secret Degree of Heat : As it is not like- 

 wife without fome Secret Degree of Light : For other wife Cats, and Owles, 

 could not fee in the Night ; But that Aire hath a little Light, Proportiona- 

 ble to the Visual Spirits of thofe Creatures. 



THe Eyes doe move one and the fame way ; For when one Lye moveth 

 to the Nofthril, the other moveth from the Noflhril. The Caufe is Ms- 

 tion of Consent, which in the Spirits, and Parts Spiritual, is Strong. But yet 

 life will induce the Contrary : For fome can Squint, when they will : And 

 the Common Tradition is,tha,t if Children^ fet upon a Table,with a Can- 

 dle behinde them, both Eyes will move Outwards ; As affecting to fee the 

 Light,and fo induce Squinting.. 



We fee more exquifitely with One Eye Shut , than with Both open. The 

 Cau[e is, for that the Spirits Vifual unite themfelves more , and fo become 

 Stronger. For you may fee, by looking in a Glafje, that when you fhutone 

 Eye,the Pupil of the other £^,that is Open, Dilateth. 



The Eyes, if the Sight meet not in one Angle, See things Double. The Caufe 

 is, for that Seeing two Things, and Seeing one Thing twice , worketh the 

 fame Effect : And therefore a little Pelet , held between two fingers , laid 

 croiTe, feemeth Double. 



Pore-Blind Men, fee beft in the Dimmer Light ; And likewife have their 

 Sight Stronger neer hand , than thofe that are not Pore-Blind; And can 

 Read and Write fmaller Letters. The Caufe is, for that the Spirits Vifual, 

 in thofe that are Pore-Blind , are Thinner, and Rarer, than in others; And 

 therefore the Greater Light difperfeth them. For the fame Caufe they 

 need Contracting ; But being ContraUed, are more ftrong, than the Vifual 

 Spirits of Ordinary Eyes are; As when we fee thorow a Level,t\\G Sight is the 

 Stronger: And fo is it,when you gather the Eye- lids iom-what clofe: And 

 it is commonly feen in thofe that arc Pore-Blind, that they do much ga- 

 ther the Eye-Lids together. But Old Men , when they would fee to Read, 

 put the Paper fomewhat afar off. TheGz»Ji?is, for that Old Mens Spirits 

 Vtfual, contrary to thofe of Pore-blind Men, unite not , but when the Object 

 is at fome good diftance^from their Eyes. 



Men fee better, when their Eyes are over-againft the Sunne , or a Candle , if 

 they put their Hand a little before their Eye. The Reafon is, for that the 

 Glaring of the Sunne t ot the Candle, doth weaken the Eje% whereas the Light 

 Cir-cumfufed is enough for the Perception. For we fee, that an Over-light ma- 

 keththefj^Dazellj Infomuch as Perpetual Looking againft the Sunne, 

 would Caufe Blindneffe. Againe, if Men come out of a Great Light, into a 

 Darke Poome; Andcontrariwile, if they come out of a Parke Roome, into a 



Light 



