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Experiments 
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3\(aturall History: 
tbelniideofGlafle-windowcs ; And the Frejl itfelfe vponthe ground 
is but a Verfim or Condenfation, of the Moift Vapours of the Night, into 
a watric iubftance : Dexees like wife, an dRaine, are but theRetumes of 
Moift Vapours Condenfed • The Dew, by the Cold onely of the S unties 
departure, which is the gentler Cold h Raines , by the Cold of that, which 
they call the Middle Region of the Atre 5 which is the more violent 
Cold. 
It is is very probable (as hath beene touched) that that, which will 
turne (Voter into Ice , willlikewife turne Aire Some Degree nearer vnto 
water. Therefore try the Experiment of the Anificiall turning Water into 
ice (whereof we fhall fpeake in another place)with Aire in place of Water 
and the Ice about it. And although it be a greater Alteration to turne Aire 
into Water,than water into Ice: yet there is this Hope, that by Continu¬ 
ing the Aire longer time, the effect will follow; For that Artificial! Con¬ 
ner fion of water into Ice, is the worke of a few Houres • And this of Aire 
may be tried by a Moneths fpace, or the like. 
Induration , or Lapidification , of Subftanccs more foft, is 
hkewife another degree of Condensation ; And is a great Altera¬ 
tion in Nature. The cffe&ing and Accelerating thereof is very 
worthy to bee inquired. It is efFc&ed by three Meanes. The 
firft is by Cold ; whole Property is fo Condenfe^nd conftipace, 
as hath beene (aid. The Second is by Heat , which is not proper 
but by confequcncc > For the Heat doth attenuate; And by At¬ 
tenuation doth Tend forth the Spirit and moifter Parc of a Bo¬ 
dy ; And vpon that, the moregrofte of the Tangible Parrs doe 
contract and ferre thcmfelucs together; Both to auoid Vacuum 
(as they call it; ) Andalfo toMunice themfelues againft the 
Force of the Fire ,which they haue fufFered. And the third is by 
Afimilation ; when a Hard Body Affimilarcth a Soft, being 
contiguous to it. 
The Examples of Induration , taking them promifcuoufly, 
are many : As the Generation of Stones wirhin the Earth, 
which at the firft are but Rude Earth, or Clay : And fo of Mi- 
neralls , which come (no doubt ) at firft, ofluyces Concrete, 
which afterward indurate : And fo of Porcdllane, Which is an 
Artificiall Cement, buried in the earth a long time .* Andfo the 
Making of Bricke, and Tile : Alfo the Making of Glafe, of a 
I certaine Sand, and Brake-Roots, and fomc other Matters; Ai- 
fo the Exudations of Rock-Diamonds , and Cry flail , which har¬ 
den 
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