, c 5017 ) 
mm m ilto pflerUri PrtfmMe^ ex eo quod ad dmrfa he A f metis vel cuj^f" 
vuobfiaculi G H, fedibm aliquot nlterius remoti, eilUhentHri^ p^tavio- 
lacci radii ad H, rubri ad G, & intermedii ad loca intermedia : & tamen 
-proper determinatam fofitionemforaminum necejfe eft ut ft mi I Jit incidentia^ 
radiorum cujafque cohris per utrHmque trajebti. Atque ita ex menfura con* 
fiat radios y. diverfis cokribus affeuios^ habere diverfas leges refraUhnnm. 
Sedfufpicor mde adhi^as fit R.P. in dnbitationem ^ nemfe videt^r collo^ 
eajfe priraum Prifima A poikTabulam B C, at que it a convertendo circa Ax- 
em^ verifimile efi inclinati&nem radiorum qui interjacent foramina propter in- 
termediam refraEiienem fuilfe mutatam. At ex defcriptione expofita in PhiL 
Tranfadionibus ^fte/- Tabula ilia collocari poll ^ f^/V. 7^^/^.80.^.3078. 
Prifima ^ut radii inter foramina in direlium jacerent^ qu<e 'veda Latini ita [a- 
memadmodum ex verbis S I took two Boards and nant ; Capiebam duas 
placed one of them clofe behind the Prifm ^abulas ligneas,unam- 
itth.mndow\ co4^re potefi, Et ufi^ Ex- t^::^^^^:^ 
perimenti idem innuit, ad feaeftram. 
Ex abmdami placet obfervare , quod in hsc Experiment 0 color at a Lux oh 
refraHionem fecundi Prifmatis longs minus diffunditur ac divaricat , quam^ 
Cfim aibaexiH-it^ adso ut imago ad G vel H fit pene circularis - prctfimi??^- fi 
Pri[mataftatuanturpi^ralleU& incontrario fituangulorum, prom in Sche- 
mate defignantur* ^uinetiam, fi praterea diameter foraminis y ad^quet la- 
titudinem coiorumy nulla erit ejufdem color at ^ lucis in longum diffufio \ fed 
ima£o, qua d quopiam colore ad G vel H effinghur^ (pofitis circularibu4 fo- 
raminibm^ & refraClione pofierioris Prifimatis nonmajori quam priorls^ ra* 
diifque ad-obftdcu 'urn qnkm prexime ferpendicuUribm erit plane circularis. 
Id qmd arguit dijfufionem, de qua fupra egimus^ non ex^contagione vel con-- 
tinuitate materia undulantis ant celerrin^e motdt vel firmlibus caafis ortam effe; 
fed^x cert a rtfraUionum cujufque generis radiorum lege. Cur mtem Imag^ 
ilia in nno cafu fit circulars, & in alUs nonnihil oblongata^ quomodo dijju- 
fio lucis in longitudinem in quolibet cafu pro arbitrio mimi poffiit ^a Geometric 
determlnandum & cum experlentia conferendum relinqu§, 
Poflquam Prop'rietates Lucis his& fimiiibm^experimentis fatis explorat.t 
fuerint^ fpeEiande radios tanquam ejus five collaterales five fucceffiVM partes^ 
de quihm experti fi^mus per indefendentiam quod fint ab invlcem diflinEitt ^ 
Hypothefies exinde dijudicanddi funt^ qU(Z nm pojfunt conciliari reijciendee, 
S^d leviffiimi negotii efi^ accommodare Hyp&thef ?/ ad banc DsEirinam. Nam 
fiju^s Hypothefin C^r tcCunm defendere ve lit, dice/^dum. efij gUhidos ejfe 
in^qua'es vel preffiones globulorumeffe ali^s aliis fortiores ^ ^ inde divsr- 
fimode refrangibiles J apt as ad excitandam fenfationem diver fior urn color t<m. 
Et fic juxta Hypothcfin C\,liooklvdicendum efi, ZJndulationes £theris eJfe 
aliiU majeres five craffiiores aliis. Atque ita in CdHteris. H^ec emm videtHr 
effe fumme necejfaria Lex & Conditio HypOthefmni, in qulhus Naturalla 
corpora ponuntur confiare ex qukmplurimts corpufculis acervatim context is ^ tit 
a, diverfis lucentium corpufculis ,vel ejpffdem corpufculi diverfis panibus (prout 
m.Gtu fig^r4^m9leiau$,aiiis qualitmbus differ unt )in(^qmlcs preffiones^motiones 
