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follow the sun, by reason of neediness of nature, in the weaker fires of Venus and Mercury; the rather, because Galileo has discovered certain small wandering stars attendant upon Jupiter. These then are the things I see, standing as I do on the threshold of natural history and philosophy; and it may be that the deeper any man has gone into natural history the more he will approve them. Nevertheless I repeat once more that I do not mean to bind myself to these; for in them as in other things I am certain of my way, but not certain of my position. Meanwhile, I have introduced them by way of interlude, lest it be thought that it is from vacillation of judgment or inability to affirm that I prefer negative questions. I will preserve therefore, even as the heavenly bodies themselves do (since it is of them I am discoursing), a variable constancy.
Note. The parts of the Index printed in Italic refer to the Editors' Prefaces and Notes.
Abecedarium naturæ, primumque in operibus
naturarum abstractarum, ii. 17.
Abel, an image of the contemplative state, iii.
pastor, imago vitæ contemplativæ, i. 465.
Abietis lignum minime densum, ii. 248, 249.
Abridgements of learning condemned, iv. 494.
of the Platonists, iv. 69, 75.
Acceleration, ii. 442-448.
of falling bodies, i. 625.
of the clarification of liquors, i, 442–446.
of putrefaction, ii. 451-453. See Putre-
of birth, two causes of, ii. 457, 458.
early ripening of the embryo, ii. 457.
plenty of nourishment, ii. 458.
of germination. See Germination.
Accent of sentences, iv. 442, 444.
Accident, the originator of all the noblest dis-
Accidents of words, iii. 401.
Accumulation of laws, how to remedy, v. 98
Aceti aspersione turbinem compesci, ii. 50.
his theory of tides, iii. 45, 46.
his statements as to the winds in the
Acoustics. See Sound.
Acroamatic method of discourse, iv. 450,
theatralis in dicendo, i. 711.
Action and contemplation, conjunction of, i.
Actium, battle of, v. 86.
Active good, pre-eminence of, iii. 424.
difference between public good and, iii.
life, why to be preferred, iii. 422.
virtutes magnetis non impedit, ii. 312.
proles raritatis, i. 285.
Adrianus imperator, i. 472.
Adulatio, antitheta de eâ, i. 703.
Advancement of Learning, preface to, i.
Advancement of Learning-continued.
date of, i. 415.
original design of, i. 415, 416, 418.
the doctrine of, v. 57, 78.
Ægyptii brutorum effigies in templis cur posue-
Enigmatica dicendi methodus, i. 665.
Aer corpora naturalia multum turbat, i. 350.
aditus ejus, cur prohibendus, i. 351.
dupliciter innuit, ii. 175, 220.
per clausuram meatuum, ii. 176.
mutatio ejus in peregrinando bona,
tanquam res indigens omnia avide arripit,
per calorem dilatatur simpliciter, ii. 267,
humiditatem terræ deprædatur et in se
rarefaction is quantæ capax, ii. 283.
dilatatus figi potest ut se restituere non
ipse in aquam in regionibus supernis ver-
versio aeris in aquam optativa, ii. 604.
opera ejus in Universitate rerum, ib.
impulsu densatus frigidior, iii. 701.
per respirationem receptus, iii. 704. See
Esculapius, god of healing, iv. 379, 381.
and Circe, fable of, iii. 371.
Esop, fable of the Frogs and the Well, iv.
of the Fox and Cat, iv. 471.
fabula de Vulpe et Fele, i. 687.
de decursu ætatis, historia conscribenda,
Eternitas materiæ, iii. 110.
terræ, iii. 749, 750.
ex rationibus motus non probanda, iii. 750.
ethnicâ jactantiâ, cœlo soli attributa, iii.
scripturis sacris, terræ et cœlo ex æquo, ib.
Ether purum et immutabile, iii. 751.
Ethera sive spatia coli interstellaria, iii.
an unus perpetuus fluor, iii. 744.
Aetites, or eagle stone, ii. 401.
Affability, Cicero's commendation of, iii. 446.
antitheses for and against, iv. 486.
Affections controlled by eloquence, iii. 410.
poets and historians, the best doctors of
their relation to reason, iv. 457.
and perturbations of the mind, v. 23.
neglected by Aristotle in his Ethics, b
loco morborum animi sunt, i. 735.
Affinity, chemical, iv. 245.
"Africa semper aliquid monstri parit," why,
condensing of, whether the cause of in-
in onions, ii. 350.
great sempervive, ii. 350, 351.
sprouts from stumps of trees, ib.
commixture of air and flame, and
vital spirits of living creatures, ii. 352.
on bright nights colder than on
close, warmer than open, ib.
salubrity of, fresh and healthful must be
selected for habitation, ii. 592, 605.
salubrity of, how known, v. 297.
concussion of the, ii. 395, 396.
exclusion of, disturbance in bodies caused
by its operation, iv. 233.
2. by filling them up.
a needy thing, seizing everything with
dilation of, dilated simply by heat, v.
licks up the moisture of the earth
and turns it into itself, v. 376.
how far capable of rarefaction, v.
whether when rarified it can be so
admits of considerable contraction, v.
its importance in the universe, ib.
a second chaos, ib. See Aer.
Albedo, forma ejus, i. 270, 566.
Alchemist, dischargeth his art upon his own
errors, iii. 497.
Alchemists, varieties of, ii. 448, 620.
Alchemy, iii. 289, 362.
Alchymia, i. 456.
Alchymistæ, utilia multa invenerunt, i. 193.
Alexander the Great, sweetness of his skin, ii.
discovery of his body by Augustus Cæsar,
an example of learning and military ex-
his education, iii. 308.
his estimation of learning, ib.
his excellent use of metaphor, iii. 310.
his reprehension and use of logic, iii.
his mode of warfare, iv. 328.
Alexander Magnus, Aristotelis discipulus, i.
ausus vana contemnere, i. 459.
exemplum arctæ conjunctionis militaria
apophthegma ejus circa Diogenem, ib.
de sanguine suo, i. 474.
ad Callisthenem, ib.
de Antipatro, ib.
de Hephæstione et Cratero, i. 475.
ad Parmenidem, ib.
Alexander Borgia, de expeditione Gallorum
of the French at Naples, iv. 371.
change of necessary, when the effect has
rapid consumption of, by the living
proportion of secretions to, ib.
of the stars, v. 540.
Alimentatio per exterius, ii. 222.
historia alimentationis conscribenda, i.
Alimentation by separation, i. 339.
promoted in four ways, iv. 392, 393.
the source of repair in living bodies,
nourishments, by what rules to be selected,
orifices of reception, v. 242.
modes of assimilation, ib.
degrees of nourishment, v. 243.
whether it can be taken by other ways