«8 «<* ( o ) )* 



*uKri*i* C4- cjusdem poroficacibus ignea corpufcula facile admiccencibus 

 ? * x - pronum eft adfcribcre. Verum fi accenciorerem animoper- 



pendamus , pbaenomcnon occurrcc ec inquificu curiofius , cc 

 RtpeMa f c i cu jucundiufc. Non modo ecenim igni admocum, cxcraneura 

 lm"mUer ec advencicium imbibic calorem , fed mallei folum ope cancus cx 

 imaiefiiu frigidiffimomecallo calorexcicacur, uc reference * Boyleo, ful- 

 phur incendere valerec. Acque hoc quidem in memoriamre- 

 vocac laude cc fpedtacore dignumcxperimencum, quod mihi 

 jamdudumrccenfuicoculacuscefbs, Dominus Abbas LuciusMa- 

 r encius, acri Vir ingenio praedicus, ec om nigena ferme erudicione 

 Mira u p r aeclarus. Is cum force Berolini degerec, Chymicum qucn- 

 ^tnortto* dam offendic HermannumSanfonium, vel hoc unomehercle 

 'wiefecndum digniflimum, uc honoris caufanominecur, qui ferrum in pera 

 uopenfto, g C ft arc folcbac affabrc adeo mireque cemperacum , uc quinque 

 tancummodo vel fex mallci idhbus excullum plurimo rubore 

 micarec, proxima quaeque incenderec, comburerec, ec longe 

 laceque fcincillas cjacularecur. Vndenam ergo cancus e ferro 

 repcnce calor cmergic? Vecus eccnim eftaflercio, caquc recen- 

 ciorum fcre omnium fuffragiis firmaca , mechanicam calorisge- 

 neracionem a vehcmcnci infenfilium parcicularum agicacionc 

 pendcre ; ferri auccm parciculas aegerrime divelli ec diflocian 

 poffe , plusquam decics didum. Vc igicur difficulcacifacisfiac, 

 animadvercendum eft, mocumillum, quem calorificum appel- 

 lanc , non dircft um, fed percurbacum ec reciprocum efle debere, 

 uc prac caeccris ingeniofeadmodum in fua dc Calorisnacura Dit 

 fcrcacione oflendic Dominicus Gulielminus, Vir profc&o omni 

 encomio major, ec dum viverec oon minus obiequio, quai 

 amore a me exculcus. 



Hoc praenocaro, haud acgreproblemacisfolucionemrepcr- 

 cum iri confido. Percuflo ecenim vehemcncer ferro , cum rigi 

 dicas, cc irregularicas vecenc, quo minusuna fuperalceramqui 

 dammodo prolabi, ecexcurrerepoflic, reliquumcancummod< 

 efl, uc percuflionis vis in fingulasinfumacurparciculas; ecideo 



sirca 

 f Toac1.-3.pag, 308« 



