^umlon^&c, 4, To give theHiftory of the tunklet ind Adnf- 
eles of the Eye, aflerting Retina to be the formal organ of 
Vifion J and Seven JUfffcles to perform all the motions therein^ 
and obferving the curious ftrnfture and apparatus in all. 5, To 
difcourfeof the various Diftempersof Eyes ^ and to obferve^ 
that there is Icarce any particle of that organ, not fubjeft to 
fome peculiar diftemper 5 which he very learnedly and accu- 
rately fpecifies and enlarges upon. 
ihirdly^ he treats of Hearing and its Organ, having premifed, 
that the difference of the feveral Senfes confifts only in the dif- 
ferent ^p/^^^/x^, by which all the fenfible Ob jeds are received 
in one and the fame formal organ,of the fame kind^as allb^what 
Analogy there is in the ftrudure of the Eye and Ear 5 the Cor" 
nBd. of the one ^nfv/ermg the Memhran of the other^the Water 
within the Cornea^ to the Air within the Tympanum ^ the Ciliar 
ligaments of the Eye, relaxing or ftreightning the PHpiU^ to the 
Stapes of the Ear, capable to be eafily moved inward, and a lit- 
tle outward. Now of thisSenfe ofHearinghe obferveth,i.The 
Air-refleiting organ (anfwerable to the Refradive organ in the 
Eye) and remarketh the admirablenefs of its fabrick; as alfo 
how exaftly every vibration of the Air j made upon the Drum 
by the outward Air^is by the Labyrinth of theEye diftinguifli't 
from one another. 2. The manners how Hearing is performed 3 
where occur divers un-common Obfervations about the Malle- 
m^ Incus^znA Stapes '^ and the three Holes in the Drnm-^as alfo of 
the paflage^by which the cavity of the Drum hath a confeat 
with the Palat, C^^-. The many diftempers of this Organ^ve- 
ry accurately defcribed* 
Fourthly^ concerning the Senfe of Smelling^ he i. Taketh no- 
ticejthat Vefalius was the firft/hat rightly obferved ihcOlfaBory 
Nerves* 2. He obferveth the Analogy of this Senfe to thofe of 
Seeing and Hearing* 5* Giveth the reafon, why Doggs, Horleii, 
and fome other Animals excel the reft in the ftrength of Smel- 
ling* 3. Affirms, that moifture falls into the Nofe, not by the 
Holes of the Os Ethmoides yhut by thofe that are in the inward 
corners of the Eyes. 4» The Difeafes of this Senfe^where the Au- 
thor taketh occafion to cominend the Art of Taliacotius in re- 
ftoring loft Nofes,and to confirm the truth of that Prddice^pef- 
formed by his own Father, 
