CryflaUi Helvettu ex r&rioribus. 1 1 1 



Pondus in aere libero 



inaqua - 14. 3 2. 

 proporcio adaqiram 2|! ad 1. 



Crucem figunc haftenus phaenomena circa Cryftallor 

 obvia, fpeciacim eas, qu<z pilis, fetis variorum colorum^ uc eft 

 num, II. (unt referta. Ec force forcuna occurrenc experi- 

 menca, quae maceriaeha&enus obfcuriflimae foenerabuncur lu- 

 cem. In hancforfan claflem merecur referri phaenomenon, 

 quod hifce diebus occafione CollegiiPhyfici Experimencalis 

 fefeobculic.Laminasfumfi 12. vicreas cenues, aeciologiampel- 

 lucidicacis& opacicacis demonftracurus,impoficas invicemde- 

 merfiin aquam puram, comifTccexhibebancfilamencapilifor- 

 mia,uc lapidem Jovem quis jurarec, incerjacere laminis ipfis 

 pilos, Ica concepcu haud eric difficile, cryftallina maceria, 

 eo cempore, quoex fluida mucaca fuic in folidam, ve! prefla 

 vel accra&apocuifle maceriam qualemcunque hecerogeneam, 

 eciam fluidam, formare illiusmodifilamenca, qu# in lapide 

 alias diaphano perjuctindum prsebenc fpe&aculum, & Mufeis 

 ornamencum» Ec huic ipfi macerias hecerogene^ fi inerac 

 force aer elafticus magis quam eft in ipfaCr)'/?^(?,pocerachic 

 ipfe preflus , inftance folidacione , qua daca porca exicum 



quaerens relinquere filamenta , uc fepe confpi- 



ciuncur 9 imprimis Microfcopii 



ope,cava. 



OBSER- 



