( «7») ; 
and "Earth. The Increafe , and Diminution, the Transformation and: 
Comparifon of divers Solids , and the Menfuration of divers of their Sur; 
faces. 
3. C/Opticks 3 Book*.-. 
in the firfl, he handleth the fimple and direfl Appearances of Objects > 
meaning fuch appearances as are not liable to Reflection or Refraction^ 
and herein he faifh,. that parting by flight matters, he onely treats of fuch 
as are either new, or of the better efteem ; foch as are the Properties of the 
fight, the manner of ks perceiving aDiftance; and the Place of the Eye 
being afTigned, to find that Height, in which a greater Length or Breadth 
fliail appear equall to a lefTer Length or Breadth,or any affigned Length or 
Breath (hall appear in a given Proportion. He likewife finds the Portion 
of a Cone or CjUnfar^,. feen according to the Magnitude ofcthe Figure, and 
Pofition of the Eye,and expla ins the Moons Phafes. 
In the 2d,. He handles the Theory and Practice of the Verfpetiive or 
Scenographiek^Vrojettion,or Tranfcription of a given Magnitude into a Plain, 
which cuts the Optick Vyramid^ wherein he explains the Dired appear- 
ance, and the Monftrous deformation of an Object, which at a certain 
place {hall appear beautiful.. , 
In the S3 d. He treats-of the AflronomickjVrojecliohs- of the~S+>heare, and 
thence derives the triple Aslrolabe, and fhews their ufes,. and ^he Con- 
veniences or Incoaveniences of each projection : viz,, the Projection on 
the Vlain of the 'JE,quator y the Eye being in one of the Voles ; or on the 
Vlain of the Colure of the Sol ft 'ices , the Eye being in one of the ^AEquinoBial 
Voirtrs; and -theorthcgraphicl^ Projection, by Perpendiculars falling frora 
therefpedive Points of the Cirelesof the Spheare, on the Projecting Plain : 
Such a Projection y . if theJPiain be -.the Meridian, Vtolomj called the Ana? 
lemma. 
If the Eye.be in the Zenith or-Nadir projecting. oa the VUin of the 
Horizon, the Author fheweth, that the Projection will be the fame,as if the 
Eye were in one of the Voles projecting .on the Vlain of the ALquator, 
onely the names of Circles are changed. 
Pag. 205 '. Nam Circuity qui in iHa refer eh At zALquMorem y in hac. Hori- 
zontem rcprafentat ^ ^Vrojetlur^Tropicorum reliqucrumq^JsLquatori far air 
lelorum in illa> " in hac^funt VrojeBura parallelorum Horizonti feu Almican- 
larath &f $!$^ & Ver- 
ticalium, in hac projeilura erunt j£quatoris & Parallelorum ejus, acNe.- 
ridianorum. Voftremo reft* line a, qua per Centrum Vrojetlionis- dncl*, erant 
projetlura Meridianbrum in ilia y in hac erant^ Verdcalium Projecturae; 
quart qui, illimVr&jeZtkmsmodHm probe intdltxmP^hanc quoqynullo negotio 
lm ; Ivy i. 
