XV.

_MADAM,_

I have taken several questions out of your new _Author_, which I

intend to answer in this present Letter according to the conceptions

of my own sense and reason, and to submit them to your censure; which

if you vouchsafe to grant me without partiality, I shall acknowledg

my self much obliged to you for this favour. The first question is,

_Why wet Linnen is dried in the Air?_ I answer; That, according to my

sense and reason, the water which is spred upon the linnen, being not

united in a full and close body, dilates beyond the Circle-degree of

water and wetness, and so doth easily change from water to vapour,

and from vapour to air, whereby the linnen becomes as dry, as it

was before it became wet. The second question is, _Why Water and

Wine intermix so easily and suddenly together?_ I answer: All wet

liquors, although their exterior figures do differ, yet their interior

natures, figures and forms are much alike, and those things that are

of the same interior nature, do easily and suddenly joyn as into one:

Wherefore Wine and Water having both wet natures, do soon incorporate

together, whereas, were they of different natures, they would not so

peaceably joyn together, but by their contrary natures become enemies,

and strive to destroy each other; but this is to be observed, that

the sharp points of the Circle-lines of Wine, by passing through the

smooth Circle-lines of Water, help to make a more hasty and sudden

conjunction. The third question, is, _Why Light, which in its nature is

white, shining through a coloured Glass, doth appear of the same colour

which the Glass is of, either Blew, Green, Red, or the like?_ I answer:

The reason is, that though Light in its nature be white, and the Glass

clear and transparent, yet when as the Glass is stained or painted with

colours, both the clearness of the glass, and the whiteness of the

light, is obstructed by the figure of that colour the glass is stained

or painted withal, and the light spreading upon or thorow the glass,

represents it self in the figure of that same colour; indeed, in all

probability to sense and reason, it appears, that the lines or beams

of light, which are straight, small, even, and parallel, do contract

in their entrance through the glass into the figure of the colour the

glass is stained or painted with, so that the light passes through the

glass figuratively, in so much, as it seems to be of the same colour

the glass is of, although in it self it is white, lucent, and clear;

and as the light appears, so the eye receives it, if the sight be not

destructive. The fourth question, is, _Whether_ (as your _Authors_

opinion is) _kisses feel pleasing and delightful by the thinness of

the parts, and a gentle stirring and quavering of the tangent spirits,

that give a pleasing tact?_ I answer: If this were so, then all kisses

would be pleasing, which surely are not; for some are thought very

displeasing, especially from thin lips; wherefore, in my opinion, it

is neither the thinness of the parts of the lips, nor the quavering of

the tangent spirits, but the appetites and passions of life, reason,

and soul, that cause the pleasure; Nevertheless, I grant, the stirring

up of the spirits may contribute to the increasing, heightening, or

strengthning of that tact, but it is not the prime cause of it. The

fifth question, is, _Whether the greatest man have always the greatest

strength?_ I answer, Not: for strength and greatness of bulk doth not

always consist together, witness experience: for a little man may be,

and is oftentimes stronger then a tall man. The like of other animal

Creatures: As for example, some Horses of a little or middle size,

have a great deal more strength then others which are high and big;

for it is the quantity of sensitive matter that gives strength, and

not the bigness or bulk of the body. The sixth question, is, _Whether

this World or Universe be the biggest Creature?_ I answer: It is not

possible to be known, unless Man could perfectly know its dimension

or extension, or whether there be more Worlds then one: But, to speak

properly, there is no such thing as biggest or least in Nature. The

seventh question, is, _Whether the Earth be the Center of Matter, or of

the World?_ As for Matter, it being Infinite, has no Center, by reason

it has no Circumference; and, as for this World, its Center cannot be

known, unless man knew the utmost parts of its circumference, for no

Center can be known without its circumference; and although some do

imagine this world so little, that in comparison to Infinite Matter, it

would not be so big as the least Pins head, yet their knowledg cannot

extend so far as to know the circumference of this little World; by

which you may perceive the Truth of the old saying, Man talks much, but

knows little. The eighth question is, _Whether all Centers must needs

be full, and close, as a stufft Cushion; and whether the matter in

the Center of the Universe or World be dense, compact, and heavy?_ I

answer: This can no more be known, then the circumference of the World;

for what man is able to know, whether the Center of the world be rare,

or dense, since he doth not know where its Center is; and as for other

particular Centers, some Centers may be rare, some dense, and some may

have less matter then their circumferences. The ninth question is,

_Whether Finite Creatures can be produced out of an Infinite material

cause?_ I answer: That, to my sense and reason, an Infinite cause must

needs produce Infinite effects, though not in each Particular, yet in

General; that is, Matter, being Infinite in substance, must needs be

dividable into Infinite parts in number, and thus Infinite Creatures

must needs be produced out of Infinite Matter; but Man being but a

finite part, thinks all must be finite too, not onely each particular

Creature, but also the Matter out of which all Creatures are produced,

which is corporeal Nature. Nevertheless, those Infinite effects in

Nature are equalized by her different motions which are her different

actions; for it is not _non_-sence, but most demonstrable to sense and

reason that there are equalities or a union in Infinite. The tenth

question is, _Whether the Elements be the onely matter out of which

all other Creatures are produced?_ I answer: The Elements, as well as

all other Creatures, as it appears to humane sense and reason, are all

of one and the same Matter, which is the onely Infinite Matter; and

therefore the Elements cannot be the Matter of all other Creatures,

for several sorts of Creatures have several ways of productions, and

I know no reason to the contrary, but that Animals, Vegetables, and

Minerals, may as well derive their essence from each other, as from

the Elements, or the Elements from them; for as all Creatures do

live by each other, so they are produced from each other, according

to the several ways or manners of productions. But mistake me not,

_Madam_, for I speak of production in General, and not of such natural

production whereby the several species of Creatures are maintained: As

for example, Generation in Animals; for an Element cannot generate an

Animal in that manner as an Animal can generate or produce its like;

for as Nature is wise, so her actions are all wise and orderly, or

else it would make a horrid confusion amongst the Infinite parts of

Nature. The eleventh question is, _What is meant by Natural Theology?_

I answer: Natural Theology, in my opinion, is nothing else but Moral

Philosophy; for as for our belief, it is grounded upon the Scripture,

and not upon Reason.

These, _Madam_, are the questions which I have pickt out of your new

_Author_, together with my answers, of which I desire your impartial

Judgment: But I must add one thing more before I conclude, which is,

I am much pleased with your _Authors_ opinion, That Sound may be

perceived by the Eye, Colour by the Ear, and that Sound and Colour may

be smell'd and tasted; and I have been of this opinion eleven years

since, as you will find in my Book of Poems, whose first Edition was

printed in the Year, 1653. And thus I take my leave of you, and remain

constantly,

Madam,

_Your Faithful Friend_

_to serve you._

Philosophical Letters: or, modest Reflections upon some Opinions in Natural Philosophy · 第 150 / 169 题