mo 
The Probleme he fees down thus ; 
ExpoJitU in eodtm Planp^ quatmr Re Sis pjitime 
Mtis^ quint am invenire , qu<!S ab txpofitis iu [ecetur , ut 
interjeS}a [egmenta Jint in ratione data. Whereof he 
gives the folution at large. 
The fecond Treatife is defigned affo chiefly for the ufe of 
Aftronomers ; who ofren eRquire ^ theiDUCual proportion 
either of the Parts of fonie one Planefary S}'fteme,or of any 
two Syftenies, As a fo of the Diftances and Magnitudes of 
Coeleftial Bodies. Which to give in the leaft Numbers, and 
fo as to avoid greater Fradions, is a performance of as great 
ufe, as delist, and altogether new* 
TheProblemestheSolution whereof taketh up the greater 
p^art of this Exercitation, is as follows, vid, 
Expojita FraBione quavis (p^^A ff 765^7 ) FraSionem 
invenire J qu£ fit vtl Exfofits^qualis^ ji fieri pojfit\ vel 
fiiltem, qu^e Expofitar^ vel proxime fuperett vel ab ea pro- 
xme defictat ^ Denominatorem habens dato Numero nor^ 
major em : ( put a, qm numerum 999 non fuferet , fe/^ tres 
hcos non excedat ;) fitqse in Terminis minimis. 
For the doingof which, he firftlays down his Method at 
large. Next, gives a fummary of all the Rules. And then 
fub;oyns feveral Examples in both the above fpecified Re- 
duftions. 
Tothishe addsalfo, in the end, the v^ay of fi^idiogoutof 
the Proportion of the Diamctre of a Circle to the Circum- 
ference : propofed in his own words thus, vid. 
Ratio Diametri ad Perimetrum Circuit vero mimr^ fed- 
continue crejcens ftt^ Perimetri ad Diametrumve.ro ma," 
led contiutie decrefcens ; donee intra affignatos terminoi 
conftftat. 
The laft Treatife containeth the Solution of this Prob» 
leme, vid, 
Expofito Anno^ qui fit ^ verbi gratia^ in Cjclo Solaris ^ 
AnmM 22^ Lun&riy 14, Indmiommy 7: quarituTy qmtm 
ilk Amt^ Perii^di J u 1 i ana^, . 
It Martini 
