(5152 ) 
Advertifement. 
THere is in the Prefs a Body 0/ Algebra in Englifli , rcccm- 
mended thereto by fome of the Members of the K^Socitty^Compofed 
'hy that k^own Mathematician of London, Mr. John Kcrfey. This 
Mathematical Art being that, by which chiefly Des- Cartes rendrtd 
-Umfeif fo famom ^ as did Vieta before him ^ and Jince many of the Eng- 
lilh , French ,and Dutch Nation \ but ne Elements of it in an entire Bom 
>dy being yet yvell digeHed in the Englilh Language : this skilful Author 
hath taken the fains of dgeBing the choicefl things of this Science^ which 
iay difperfedinfmdry Bookj, that are either very fcarce and almo(t un^ 
procurable f or very dear : A work^which^as it will doubt lefs prove very 
fifefulfor all forts of Ingenious Students of the Mathematiiks w Eng- 
land, efpecially thofe that are not acquainted y^ith Latin, French cr 
Dutch {jn which Languages the Books of thofe Sciences are mofilyex^ 
tmt,) fo it cannot btH redound to the honour of this Nation^ to have that 
dene, T^hereby even the uncommon and abjlrufer parts $f Learning and 
Knowledge are laid open and made intelligible to all fuch Capacities her/f, 
as are Lovers thereof. 
Now ^s'for the Encouragement of the BookMhrs^aconJiderable num- 
her efperfons have already fub f crib edj^ow many Books of this Ff^ork^ they 
win take off for themfelves and their Friends • fo was it thought fit^ in 
{hid TraEl to give further notice ^ that, though a good part of this fVorl^ be 
already printed, yet if any others /hall be defirofss to fubfcribe the Paper, 
printed by the Bookj fellers for fuchSubfcriptions, they /hall be fiill recei; 
ved,addre/Jing themfelves foThoraas PafTenger, er Benjamin Hur- 
lock {living upon London- Bridge,) the Vndertakers of this Work^.who 
will a/fure ali Subfcribers^ that they /hall not pay by Three /hillings /0 
. much for each Book^, as they will be fold for in any [hop. TheTtrmSymt 
which they Are to have the Books, are i, i \ pence a [heetywhich is the cheapm 
efi price and the Money not to be paid but Hpon the Delivery sf the Bo9ks, 
The whole will take up at lea/i^ 170 /heets^ 
To give the Cnriom a /hort view of the Contents thereof S • he mil find 
in the 
Fir ft Book^ • The four Species of Algebraic operations both in Integers 
and FraUions : The Rule of Three in Algebraic ^amities : The Ex- 
traUion of Roots out of Simple S^ntities, as alfo out of a ^uaidratic 
Sl^ntity confif^ing of three Terms : The compleating of an Algebraic 
Square confi/iing of three Terms, when one is wanting S together with a 
Cotle^ion of eafie ^fie/tiens to exercife the preceding Rules: Of an E- 
quation, and the Reduction of Equations : How to convert Analogies in^ 
to Equations, and Eqnations into Analogies : The Refolution of Simple 
£quati$ns exercised in 28 ^uefiions both in Numeral and Literal Al- 
geira: The Refolution of f$ch Compound Equations, wherein there are 
t wo different Powers of the Quantity foughtyandthe Lower of tho/e Pow 
cr4 
