C »8f ) 
made him duller than ordinary, or how long the Qulck^ 
Silver had been in his Body. 
iX. A Utter of Dr. John Wallis, <f May 14. 
1698. to Sir fohn Blencow€ (cm of hk hl^.- 
jefiys Juftices of the Court of Common-^fe^s) 
concernitjg the Ob f equation of Eaiter far^ this 
prefent Tear^ on April 24, 1 5^8* 
Sir, Oxford, May 14. i5a8, 
IN Anfwer to yours of May iz. (which I received this 
Morning^ you may pleafeto prefent my humbie Du- 
ty and Service to the Lord Chief Juftice Holt, witathis 
Account of the Statef Eajler, of which heasketh. 
That there may be (bme little Miftakes in the Calen 
dar of the Common- Prayer Book (as now Printed) I 
fliall not deny.- 
But (as to the prefent Point) Eajier was obferved 
this Year, according to the Rules, (b underftood as 
was intended, though there may feem to be wanting 
a Rubrick to make it plain. 
The fundamental Rule of the Nicene Council (which 
we pretend to follow) for the keeping of Eajier ^ is to 
this purpofe : 
Eafter'^Day is to be that Sunday which falls upon, or 
next after ^ the firft Full Moon which happens next after 
the Vernal Equinox. 
Which Vernal Equinox was then obferved to fall on 
the One and Twentieth of March : And (in the Pafchal 
Tables) is yet reputed fo to fall ; (though it do now ftll 
on the Eleventh of Marchj or Ibmetimes the Teath of 
March.) 
E e And 
