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RULES and MEMORIAL CANONS for finding the
Dominical Letter, Leap-Year, Epact, Eafter, &c. ac-
such Persons as are not previously versed in Mathe-
W IT HAN
Α Ρ Ρ Ε Ν DI X,
By DAVID JENNINGS, D. D.
THE THIRD EDITION.
L O N D ON:
to his MAJESTY ; J. BUCKLAND, in Pater-nofter Row,
Hest, a Sul + Fayl lozys7 14227
Τ Η Ε
P R E F A C E.
*HE Persons for whose Sake and
Use the following Treatise was at first drawn up, (or rather I should say, as to the greater Part
of it, this Collection made out of many other and larger Books) are chiefly such, who, though they have not the Opportunity of attending to the more abstruse Parts of Mathematic Science, are desirous at least, of some general Knowledge in these Matters ; such who, though Providence has marked out their Tract of Life amidst Scenes of worldly Business, yet have Souls large enough to extend themselves, now and then, beyond this little Planet, and take a distant View of more remote Worlds ; in the Contemplation of which, both the philosophic and pious Mind may find Entertainment and Profit. The Works of the Lord are great, A 2