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OF the twelve Analytical Treatiſes recited by Pappus in

his Preface to the 7th Book of his Mathematical Col-

lections, we have very little of the Originals remaining, viz.

only Euclid’s Data, and part of Apollonius’s Conics. The

loſs of the reſt is very much to be lamented by all Lovers of

the Mathematics. “ Valde quidem dolendum eſt quod re-

liqui tractatus Veterum Analytici, a Pappo memorati,

aut perierint, aut nondum lucem conſpexerint. Nam

minime dubito quin eorum nonnulli, Arabicè ſaltem

verſi, alicubi terrarum lateant, pulvere magis quam tene-

bris ſuis involuti. ” Dr. Halley’s Preface to his Apol-

LONIUS DE Sectione Rationis et Spatii.

his Preface to the 7th Book of his Mathematical Col-

lections, we have very little of the Originals remaining, viz.

only Euclid’s Data, and part of Apollonius’s Conics. The

loſs of the reſt is very much to be lamented by all Lovers of

the Mathematics. “ Valde quidem dolendum eſt quod re-

liqui tractatus Veterum Analytici, a Pappo memorati,

aut perierint, aut nondum lucem conſpexerint. Nam

minime dubito quin eorum nonnulli, Arabicè ſaltem

verſi, alicubi terrarum lateant, pulvere magis quam tene-

bris ſuis involuti. ” Dr. Halley’s Preface to his Apol-

LONIUS DE Sectione Rationis et Spatii.

Some ingenious men have attempted, from the account of

them given by Pappus, to reſtore ſome of theſe loſt Trea-

tiſes. Snellius has endeavoured to give us the Books De

Sectione Rationis, De Sectione Spatii, and De Sec-

TIONE Determinata. Fermat and Schooten have laboured

in the Treatiſe De Locis Planis; and Marinus Ghetaldus

in that De Inclinationibus. But thoſe who have ſuc-

ceeded beſt, and done the moſt this way, are two incom-

them given by Pappus, to reſtore ſome of theſe loſt Trea-

tiſes. Snellius has endeavoured to give us the Books De

Sectione Rationis, De Sectione Spatii, and De Sec-

TIONE Determinata. Fermat and Schooten have laboured

in the Treatiſe De Locis Planis; and Marinus Ghetaldus

in that De Inclinationibus. But thoſe who have ſuc-

ceeded beſt, and done the moſt this way, are two incom-