( 4092 ) 
atq^HS adil mg, J^A'^ ang^ n m B J ^ an^.FLJ^ang.BHI 
froinie t^efraUdrum HI ^ mn mdem sritadJnvm 
ifi tmidenmmradmmm FL^^Js^G, Siurgo angulm Fk^ ^o min, 
(squdis nempe [ohri diametro^ & erit m^lus^y q^uem HIM mn 
comprehendtmt:^ etiam^omin.f modo radii FL ^ KG ^qualiter res 
frmigibiles fl^tuantur.At mihiexpsrientiproatit mgtdm tile cmiter 
It grad, 49 . min, quern radius Hl^ extremum viQlmeum color etn, ^ 
m n^£rideum eothihms^ confiituere^r^ac poinde radios illos diverfi- 
mode refrangibilesejje:, five refraBioties fecundnm difparerr^ 
incidentice & refraUionis rationemperagi necejjano concsdendum efi. 
Addit'pr^erea/B:^, qmdnQnfu§^madobeundumriU€dctdum^ 
' e% bngitndmimaginis impaU^ m Chart am fkbtrahere maghitudinem 
foraminis feneftrce quandoqmdem etiam pofito foramina indivifibili^ 
adhuefieret aliudvelutijoramen latum in pofimorifuperfiae prifma, 
tih Mihi tamehvidetur^ his noH ebfiantibus, quad rejraUienes ra' 
diorumjn anteriori £que ac inpojieriorifuperficie Prifmatis decujjan* 
imm^ex aijnbitis frineipiii pojjint rite computari. Sed fires [ecus 
ejjet^ iatitudo hiatus in pofleriori [uperficie, quod ad infiar f or ami- 
nisefi^ bandefficeret erroremdmrummmutornmfecund@rum'^ & in 
rebus praUicis non opercepreiium ducQ ad minutias ifias attendere, : 
llliinfuper experimental quodCmchvocaveramy nihil adverfat 
tur ^♦Pj dum contendit^ incequales radiorum^ diverfis cohribus im* 
dutornm, refra&iones ex in^equalibus incidentiis effeUmfuijfe^ Nam 
radiisper duo admodumparva^ ab invicem diflantia ^ immotafo' 
ramina^tranfemtibus^ incidenttieillce, pr out ego experimentuminjlu 
fuz, omnitw £qualej erant, tamen refraUionss Uquidoin^quales, 
Sinille de experimentis nojlris dubitet, oro^ut radiorum diverfis eo- 
loribps prisditorum refra^iones ex incidentits paribus menfuret^ 6 
fientietinaeqmles effie^ Si modus ille, quern e^o ad hoc negotium ad* 
hibui, minus placeat (^quo tamen nuUus potefi ejfe luculenttor<^^ facile 
ejl alios excogitate 5 ficut ^ alios ipfe baud paucos Cum fruUu eX* 
pert us fum^ 
CentraTheoriam.deColotihm obijcitur^ quod pulveres diver [o* 
rum celorumperhiifii mfi cdndidum fiub^bfcur^m ^ fufcum eolonm 
exhtbent. Miki vero albus^ niger^ (3 omnes intermedii fufci, qui ah 
albo t3 nigro permiflit componipofiiint^ non fpecie cohris fed quanti* 
tate iucistantum 4ijferre videntur, Et cumin mifiione pigmentorunij 
fingula corpufcula mn nifi prpprium coloremrefleSantfadeoqjmaxi^f^ 
pars 
