rodem minorem. Sit A : B: : B: D- 
12 C 4 B D minor erit quam 
arcus ABC ; differentia autem in femi-circumferentia minor erit quam ip- 
fius 7 JL^, &inquadrante minor quam ipfius^-. Inter has approxima- 
tions fit maxima, penukima fex continue Arkhmetlce proportionalium, 
qua? minor erit quam arcus, differentia autem, in /emi-circumferentia mi- 
nor erit quam ejufdem r |^, et in quadrante minor quam ejufdem ro j- o7rro -. 
Sed base levia mihi videntur, cum poffim Approximationes exliibere, qux 
ab ipfa femi-circumferentia differant minor] intervalio, quam quaelibet e- 
jus pars affignata, neque nobis amplius apparent hare mirabilia, cum dc- 
monftratio foiida innotefcat. Ad reliqua ab Hngcnio publicata, cum a meo 
inftitutofint alicna, nihil dico, nifi quod ipfa Hugeniiiia*. (non obftante 
exactiflima fua, ut ait, materiac hsjus examinatione a meae AffwdicttU 
factis, nifallor, longcfuperentur. Vale. Decern!?. 15. 1668. 
Figara Hngmi haeceft, quam ipfe hoc fenfu, licet Gal ice, fic explicar. 
Sit Amis Circuli, qui non excedat femi-circumferentia m, ABC, cujus fub- 
tenfa fit AC • & divi- 
dantur ambo in partes 
acquales per lineam 
BD. Ducta fubtenfi 
AB, capias inde-*-, eaf- 
que jungas inde ab A 
ad E in iinea CA 
pro tr a eta. Dein , re- 
fecta linear DE parte 
decimaEF, ducasFB, & tandem BG, ipfi perpendicularem : &habebis 
lineam AG acqualem Arcui ABC, cujus excerfbs tantillus erit, ut etiam tunc,, 
quando hie arcus arqualis erk femi- circumferential Circuli, futura non fit 
differentia ^ fuae longitudinis ; at quando non eft nifi tertiar partis circum- 
ferential, differentia non erit tt^ssi ct fi non & n & quarts partis, non. 
diffcret nifi zi 0 ^ fax longitudinis. 
R 
\ \ 
\ J 
E F 
A 
c 
. An ExtraSl 
of the Anatomical Account \ mitten and left by the famous Dr. 
Harvey, concerning Thomas Parre, wb$ died in London at 
the Age of 152 years and 9 moneths. 
THis Account is annexed to a Book* lately publifht in Latin 
by Dr, tfohn Betts M. D. one of his Majefties Phyfitians 
inordinary, and Fellow of the zW^-Colledge of thofe of 
that Profeflionrln which Treatife (to touch that briefly) the Au- 
thor endeavors to ihew 3; that Milky or fomcthing Analogous to 
