Vulgar Chri({im Account, either by ACcending to the Creation of 
the World, or by Defcending to our Age : He alfo for th^ fak<? of 
this Work acquaints ^he Reader that he betook Iiimfelf to the 
Explication and Caftigationof the '^/j^/r(i/i5'0<r^ Chromlogk^' cUf- 
ficorum Authorum JOHANNIS JACOBI FRISII 
Tigurini-^ fubftituting, as he affirms y a true Calculation in the 
place of a falfe one reducing the Authors;, there enumerated > 
to the true time of their Age diftinguifhing what is fuppo/jtiti- 
ousfrom genuin> and adding many things^ that were imhappily 
omitted. Which done^, he faith ^ he proceeded from this Ac- 
count of the Succeflion of Illuftrious Writers ^ to the Hiftory 
of thtOrigin^ lacreafe^ Nature Oin^ Conflitutionoi z\\ Profeffions 
Sciences and Arts-, chufing the Eight Bods of PO L TD O RE 
VI RG I L de rerum Inventories ^nd VTO G E N E S L A- 
ER TIFS^ De VitiSy & Dogmatibus^ veteris Graci£. PhildfophoruTf^ ^ 
as alfo 3 the Eight Books of ^ O H A NNE S MI T> D £ 
DORP IF S 'ne Celehribus Fni^erft Orbis ACADE- 
Mils. : , . ' r / 
He excufeth himfelf for having' maldi^ rtb further ^^^^^ 
this Defirable Work , alledging the difficulty and trouble of 
the Undertakings the una\roidable interruptions he hatli met 
with, and the narrownefs of a private Mans fortune to carry on 
fo Chargeable an Atteqapt , r^Quiring a Rpyall encouragement 
andAffiftance.:^^^^^^^^^^^/ ' 
IL TBOM^ ComELlI Conjcntini PRO<^rUnASMA^ 
TA PH YSIC A. 
This Author, a Friend to the ^4^///?^/^ Philpfophy;^^ 
tains the Curious in this Book with feven Sxercitatiom^ viz, 
I, De Ratione Philofofhandi : Where in the genuin Students 
of Naturall Philofophy he ^ry? requires theftudy of Mathematics^ 
to accuftome their Minds to a fiiied Attention, and to D:n£t Rea- 
foning; and directs them toftudy Nature' it felf;,. and to la- 
bour after a true Hiftory of Nature: recoipi^eBding /^ij^/j' and par- 
ticularly the Ufe of chjmifiry^ as an expedient key to open her 
Treafqres , and the ftudy or Mcchanic4&i. Vim'i^^^^ nearly al- 
lyedtothoft of Nature, TV. 4^ ' • ^ . 
