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# Title: [Johannis Wallisii SS. Th. D. Geometriae Professoris Saviliani Oxoniae, Tractatus Duo] Johannis Wallisii SS. Th. D. Geometriæ Professoris Saviliani Oxoniæ, Tractatus Duo (shelfmark Leibn. Marg. 103)
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D R A F A T 1O.
Fuccinto omma, sed es perspiene proponere: Non tamen qua subinde
occurrune Lemmara sincula seorsum semper demonstrare, (id enimsi
fecissem, nimis increvisset operis moles,) sed ea (altem quae videban-
cur obscuriora; reliquorum fontes vel disiro indicasse sacis esse ratus.
ded C eadem nonraro; varis inlocis, varus etiam modis demon-
strata reperiantur. Nec eandem semper demonstrandi methodum se-
cuius sum sed nunc ad morem vecerum, nune ex Geometria Indivisi
bilium, nunc etiam e ex Enfinitorum Arithmetica nostra petiris
demonstrarionibus. Non quidem quod illud necesse habui; sed que-
niam id Lectori; es maeisutile, nec minus eratum fore credidi,
quam eandem saepe cramben recoquere. Ouod moneo, ne miretur for-
san aliquis siin se quidem similia, dissimili nonnunguar demonstran-
di methodo probara vident. Non raro etiam a minutioribus nonnullis
demonstrandis consulto abstinui; nec ad sinculos forsan casus possibiles
ubique descendi; satis id ratus, s viam demonstrandi palam ostende-
rim, singulos interim apices (stillud iezo Siconrat postulent) paratus
xhibere.
Atque haec sunt quae Lectorem pramonendum purabam. Oua
quidem paulo fusius exposui, ue, qui supra memoratas chartas non
viderint, earum salcem summam, adeoque rei cesta narrationem,
hinc intelligant;  causam simul cur hac methodo mea disponatur,
quae secus alia forsan meibodo rectins disponenda esse, si res esset inte-
era existimare possent.