Cardan's who affirmed that his long life was owing to his never being out of doors before sunrise or after sunset. The rule is at least as good as that of the old man whom Bacon quotes, who always ate before he was hungry, and drank before he was thirsty. Another of these oracular sayings," Oil without, honey within," which Bacon ascribes to the mythical Johannes de Temporibus, seems to be more justly due to Democritus, to whom it is attributed in the Geoponica. That of Pollio Romilius is much to the same purpose-" Intus mulso, foris oleo."

Pliny and Aristotle are Bacon's principal authorities for what is said of the ages of different kinds of animals. From this part of the subject Bacon draws some inferences which are not perhaps without value.

The whole treatise concludes with thirty-two "Canones Mobiles," or provisionally affirmed results. They contain the sum of his theory, of which the passage I have quoted from Haller seems to give an adequate idea.

FRANCISCI

BARONIS DE VERVLAMIO,

VICE-COMITIS SANCTI ALBANI,

HISTORIA VITE ET MORTIS.

SIVE

TITVLVS SECVNDVS

IN HISTORIA NATURALI ET EXPERIMENTALI

AD CONDENDAM PHILOSOPHIAM :

QUÆ EST INSTAURATIONIS MAGNÆ PARS TERTIA.

LONDINI,

IN OFFICINA 10. HAVILAND, IMPENSIS MATTHÆI LOWNES.

1623.

VIVENTIBUS ET POSTERIS

SALUTEM.

CUM Historiam Vitæ et Mortis inter sex designationes menstruas ultimo loco posuerimus; omnino hoc prævertere visum est, et secundam edere, propter eximiam rei utilitatem; in qua vel minima temporis jactura pro pretiosa haberi debet. Speramus enim et cupimus futurum, ut id plurimorum bono fiat; atque ut medici nobiliores animos nonnihil erigant, neque toti sint in curarum sordibus; neque solum propter necessitatem honorentur, sed fiant demum omnipotentiæ et clementiæ divinæ administri, in vita hominum proroganda et instauranda; præsertim cum hoc agatur per vias tutas et commodas et civiles, licet intentatas. Etsi enim nos Christiani ad Terram Promissionis perpetuo aspiremus et anhelemus; tamen interim itinerantibus nobis in hac Mundi Eremo, etiam calceos istos et tegmina (corporis scilicet nostri fragilis) quam minimum atteri, erit signum Favoris Divini.