( *59 ) 
IV. An Account ofB 0 0 KS. 
An Account of the Third Volume of Dr. WallisV 
Opera Mathematica, in Folio ; jinijhsd and 
pubHpjed ii^ Oxford, I ^p^; the two former 
Volumes hamng been pHbUJhcd in the Years 
i6p3 and i6p^. 
HO W much the Learned World has been obliged to 
the Reverend and Worthy Dr. Wallis, S. T. D. 
CProfeflbr of Geometry in the Univerfity of 0;^/^?^^ 
and Fellow of the Royal Society) is evident to all who 
have any Concern in thefe Matters. The great Im- 
provements that have been made in Mathematical Learn- 
ing in this Century now expiring, are very much owing 
to him, who, for more than one half of it, has made 
lb great a Figure among the Mathematicians. 
The two firft Volumes of his Works, of which there 
|i is an Account given in N*» xi6 of thefe Tranfadions, 
j are lading Monuments of his great Reach, Induftry, and 
Succefs in theft abftrufe and ufeful Studies. 
1 Much of this Third Volume is imployed in Preferving 
I and Reftoring divers Ancient Greek Authors (very con- 
fiderable) which were in Danger of being loft. For 
which Work the Do(3"or is fitted not only by his excel- 
lent Knowledge in Mathematicks, Accuratenefs in the 
Languages, and great Jnduftry in collating Manulcript 
Copies ; but alfb, by^ what is peculiar to him, his Art 
and Pradiice in Detiphering ^ which enables him to make 
fagacious Conje<au\es, Supplements, and Emendations : 
Which muft often be an Editor's Bufinefi, and which we 
fo juftly admire in him. 
P p X He 
