DISSERTAT IOWS PRODRpMFS. 4 3 
tam mouetur, Cupra chartam id generis fila,mo¬ 
do , vna extremitate quiefcente, altera extremita¬ 
te omnes illos arcus percurrunt, qui intra globi 
hemisphaerium defcribi poterunt; modo tota de 
loco in locum haftatorum Militum inftar progre¬ 
diuntur j modo per alterius magnetis viciniam in- 
curuatte, arcum imitantur,ac fi fingube partes li- 
matur£ fibi mutuo agglutinatae in folidum corpus 
coaluiflent . Pari ratione permeantis fluidi ope.- 
inter Ce coerere crediderim guttulas illas, quf itu 
recipiente ab expttlfa, & retorta materia concre¬ 
ta; , primo recipientis lateri fuperius adherent, 
inde vero vbi plures fimul Ce inuicem in eoderru 
arcu recipientis contigerint, inde dilapfie variu 
fila globulofa formant extremis fuis modo lateri¬ 
bus recipientis adherentia , modo alijs filis inne¬ 
xa . Id generis fila , qug in aqueo oculi interdum 
obferuaui, e globulis compofita pari modo formata 
crederem, nec aliter fila, & ramos per appofitio- 
nem extrinfecam in fluido produ&os crediderim. 
Sed vt vt de his fuerit, in cryftalli incremento ge¬ 
minus motus confiderandus eft; vnus, quo effici¬ 
tur, vt certis cryftalli locis, & non alijs apponatur 
materia cryftallina ; quem ego motum permean¬ 
ti fluido fubtili adfcribendum fufpicor , & alla¬ 
to magnetis exemplo illuftrandum : alter, quo 
appofita cryftallo noua materia cryftallina in pla¬ 
num extenditur, qui a fluido ambiente deriuan- 
dus eft;fic vbi fuper magnetem exfurrexerint fila 
F 2 ferrea, 
