C 6153 ) 
nitudess Figures and Motions of Objeds are perceived and eRiraate 
by the fight f He delivers likewife the doiftrine of Keflexe and Ke- 
frafted Vifion, and that ofTelefcopes and Microfcopes, with more 
piainnefs, than roany others have done, ^r. 
In the third Book, he explicates what belongs to the Organs and 
Fundions of the Intemd Senfes. Where he difcuffeth thatYo much 
controrated and difficult point about the knowledge of Brute?, and 
labors to affign the Difference that is betwixt the knowledge of' Man 
andthat of other Aniinab. Tif;^ he examins the Strufture and life of 
the Brain, freferringin many things to Dr. i>F/7//k's Book on that Ar- 
gument J and trcateth of the of the Inward Senfes . difcuffing 
witha.U that ingenious opinion of Dr. importing, that theSpe- 
cie5^s of objefts are imprcfs'd in tht cortex of the Brain, whence the 
Spirits reflefted, caufe Reminifcence ^ as theSpirits flucfluating in the 
ror^^ (74//^?/^;;? produce the ad of Imagination V and paffing through 
iht medulla into nerves, excite the Appetite, or the inftind to 
fpontaneous motion, v^bilft the Spirits proceeding from the cerebellum 
produce all motion involuntary. Next^ ht difcourfes ot^ Sleep, and 
PFakj}^g \ where he takes notice of thofe Animals that flsep all the win-. 
ter long'-> as alfo of Nigbr-walkers - likewife of that opinion of Dr. 
/F^7/^*s, that Sleep and the Memory have one and the fame feat, &c. 
To aii which he fubjoineth a difcourfe of fome other AiFcdions of the 
Brain, as Giddinefs, Raving, Phrenfy, Melancholy and the like; 
of all which he acknowledges the faid Dr. PVill^ to have written with 
great learning and folldity. 
In iht fourth and laft Book he delivers the Dodrine of the Motion 
t>l Anmds^x\d^x!^t Organs thereof. And here he firfl treats of the 
nature and origin of the Nerves, and obferves the difference that i^ 
between the^r^^;^ and the After-^brdn^ relating an Experiment made 
in the Royal Academy^ by which it appeair'd, that the Brdn being cut 
in a live animal, the Motion of the Heart and the Refpiration ceafed 
not ^ but all ceafed, a? foon as the knife touched the C^r^i'^///^;?? or 
After-brain. Where he again takes notice of Dr.PFillis's fyRem, and 
very candidly profefi'eth, that he knows not, whether any thing in 
our Age have been invented more ingenious and ufeful, for explaining 
clearly the Oeconomy of the whole Animal, and its Fundions, both 
found and diforder'd. Thc/f, he enumerates all the ConjMgmons of 
the Nerves ; and here, amongft many other things, be obierves the 
caufe, why, in all the Perturbations of the Soul, the Eyes, the Face 
and the Mouth it felf, do fo exadly anfwer the AiTsdions of the 
Heart, as if they were all ftruck with the fame p/Vfrr/m^ or qnlll • as 
healfo remarketh with Dr. mV/?'/, th^t the Engin in Bruges is of a 
flighter contrivance than in Man, forafmuch as in ^/^i?/^ the Heart re- 
ceives no nerves from the Intercostal h whence there is not in thsn^. th -c 
Confent between the Heart and the Brain, that there is in Man. Fur- 
ther, he treats of the /Pi^/ir/^/, as the chid ln?VL'um^v>:t . of Sfo^naKeom 
motion.,. 
