WnrSj and thehmUe Conflagration of our Metropolis 5 jet m 
then made an Attemft of lajing feme Foundation for the Imfrovc* 
ment of real Philofophj, and for the ffreadingof Ufefulknotkedge-- 
mfuhlifhing Advkes and Dire^ions for the writing of an Experi-- 
mental Natural Hiflorji, in pointing out E([aySy Patterns and,EX' 
emflars, that have hitherto heen^ defigned in that kind ; ia giving 
notice of divers Jrtifcial Engins and In^ruments iWhich may he 
helpful for the further Dijcoveries of^^iwxt^or for the greater per- 
formances of Art. We fought out^horv far Art had then arrivd to- 
wards the perfecting of theMkro(co\)Qt, and hy rvhat means that 
curious Inflrument might he advancd and rvhat Informations it 
rvould afford my either upon the view of minute fl Bodies or of the 
Texturcy Surface^ PorofitieSy Smoothnefs or Inequalities of other 
Bodies y that were in our porter for fuch approaches. The like car€. 
we had for Telefcopes, hj what Operations j Engins^ and Applica- 
tions th"j might be further improvd 5 and what was the mo^ythey 
could thm far perform. Then we related the Finding out of the 
Rotation of fome of the Planets, and the Changeahlenef y and 
Seafons of ah fence ^ or obfcuritj in fome of the Fixt Stars, or fuch 
as fcerndto be of their Train, And never y I think y were Comets 
f^ chafed jheir Fjgures and Appearances fo detecledy their Motions 
dmoft reduced to Ruky and in a manner predi6ied ^ theSdiii Eclipfe 
in fever al and diflant places carefully calculated. And not to recite 
here, what was attempted and done by Burning-GlafTes I fhall but- 
name the Inflruments devis'd to Meafure the Weight and the 
changes of Weight of the Air, and other afcending and defcending 
Fluids p either with the Preffure of the whole Atmoffhere , or of 
fmaller parcels freed from that Preffure 5 / mean the Barofcopes^ 
^/^i/Z'^Pneumatick Engins. Theremre alfo cffred Hygrofcopesj 
to. note the degrees of Drought m Moifture in the Air 5 Thermo- 
meters to meafure the degrees of Heat and Cold 5 and an Inftru- 
m.ent to %xi^\x^x.^ Thermometers to make Standards <?/ Heac 
and Gold ; an Inurnment to meafure the Refraftions of Liquors of 
all kinds y for eflablifhingthe Laws- of RefraEiion-^ Hydroftaticks z^- 
meafure theWeight ef Liquids 3 and diners other Contrivances to 
find out the Statical poftionytendency and gravitation of Liquids ir%^ 
all parts^ Be fides y Engins to break the ha]rde[l Rocks 5 Huge Wheels^ 
and other Engins for Mines defiribed*^ to raife Winds y by the fall 
