( 5063 ) 
Angliaj Gallia, Relg^o, C^^:* Anatomicorum trthmali fe fliterify 
brevi ab ipfis^ in rei AnatomUcz incrementum^ p^nitttT elucidatum iri^ 
Vid, NtiEat). 70. p. 2 1 36. 
III. PhyftcQ Mathefts de LVMTNE, CO LO ^1 BV S 
^ "7 7^/ D Ej ^c, Auth. Franc. Maria Gnnialdo S.J, 
• Bononias, \66^,in 4*. 
THis Learned Treatife was not to be alcogethcr omictecf 
in thefe Philofophical Occurrences , though an Account of 
It hath been deferr*^d (too long,) it being but lately fallen 
into the P^/^///??^r's hands. ^ 
The Author then finding, that ranch obfcurity was left 
in the Dodrine of lig/;/, and efteemiog it rather conimcn- 
dable than prefumptuous , to endeavor the clearing of it, 
efpecially if that be done by Experiments ( which he judgeth 
an exceedingly conducive way for the Improvement of all 
Natural Knowledge 5) undertaketh in Two parts to deliver 
his Tryals and Meditations on this Sobjeft. 
In the are contained the feveral Experiments, which 
may favour the Do<5lrine of the Subftantialtty of Light, to* 
gether with the Ratiocinations thence arifing^ 
In the Seconds reprefcntedj What may be anfwered to all 
thofe Arguments, fo as to fave the Peripatetic^ Opinion of 
'l\iQAccide?italityoiL\^t: Which yet is done in fuch a man- 
nerj as that the Author leaveth a liberty to the Judicious Rea- 
der^ to embrace which of thefe two Opinions he fliall think 
the more probable. 
Bat^ more particularly, in the /im^r part he explains, How 
many ways Light is propagated or diffufed , viT;^ not only 
direilly, and by refraUion, and reflexion, but atfo by diffrailion:^ 
which laft, according to him, is done, when the parts of 
Light 5 feparated by a manifold difTe^lion ^ do in the farm 
medium proceed in different ways. Next\ he eonfiders the 
Nature of Light, as alfo Diaphaneity 5 and Opacity; and 
takech notice^ that moft Bodies 3 whether Solid! or Fluid, 
are 
