Note that all Masculine Nounes in the singular number, end and terminate either in O. or in E. or in A. and all in I. in the Plurall, except some few heteroclites, whereof shall be spoken hereafter, as for example. Il Castẻllo, Il Ciẻlo, Il líbro, Il tẻmpo, L'ódio, L'orgóglio, &c. I castẻlli, I ciẻli, I líbri, I tẻmpi, Gl'ódij, gl'orgógli, &c. Il fiúme, Il nóme, Il pádre, Il sángue, Il túrbine, &c. I fiúmi, I nómi, I pádri, I sángui, I túrbini, &c. Il Dúca, Il Poẻta, Il Profẻta, l'Euangelísta, &c. I Dúchi, I Poẻti, I Prophẻti, Gl'Euangelisti, &c.
Note that most of Italian Feminine nounes end in the singular either in A. or in E. if in A. then in E. in the plurall. As for example, La bálla. la cárta. la tẻrra. la táuola, &c. Le bálle. le cárte. le tẻrre. le táuole. &c. L'ácqua. L'ánima. L'ácque. L'ánime. &c. And if in E. in the singular, then in I. in the plurall, as for example, La consuetúdine. La mádre. La ménte. La salúte. &c. Le consuetúdini. Le mádri. Le ménti. Le salúti, &c. L'occasióne. L'occasióni. One only Feminine noune endeth in O. that is, La máno, which in the plurall endeth in I. as Le máni.
Note that all Feminine nounes that in their Ablatiue case singular of the Latin end in Áte, or V´te. The Italians (namely in prose) reiect and loose the last sillable Té, and take the rest, euer placing an accent ouer the last A. or V. making Singular and Plurall all one, which they distinguish by the Articles, or by the Adiectiues, or by the Pronounes ioyned vnto them, as for example, La Città. La qualità. La quantità. La realità. &c. Le città. Le qualità. Le quantità. Le realità. &c. La giouentù. La seruitù. La vertù. &c. Le giouentù. Le seruitù. Le vertù. &c. Yet obserue that Poets may, and doe often dispence with this rule: for at their pleasure they may vse both, yea and often change Te into De, as for example. La città. la cittáte. la cittáde. La qualità. la qualitáte. la qualitáde. La vertù. la vertúte. la vertúde. &c. Le città. le cittáti. le cittádi. Le qualitá. le qualitáti. le qualitádi. Le vertù. le vertúti. le vertúdi. &c.
Note that all Italian Feminine nounes that end in Ántia or Éntia, may at the pleasure of the speaker or writer, end in Anza or Enza, and Tuscans count the latter the best, as thus Abondántia, Abondánza. Vigilántia, Vigilánza, &c. Diligẻntia, Diligẻnza, Patiẻntia, Patiẻnza, &c.
Note that all Italian Masculine Nounes, that in the singular end in Io. whereof there are many, should in the plurall end in ij. as for example. Essẻrcítio, Ódio, Ótio, Vítio, Essẻrcítij, Ódij, Ótij, Tẻmpij, Vitij, &c.