1000000031

M A R

( 25 )

M A R

Qod the corr:mon

[O(l

white m;ublc. are very

¡nlpropt:r

pertorm

thde

opc-ratiuns upon.

Heat is always necelfary for the opcning lhe pores

(he

m.ubk. fo as

render

rec(!ivc' (he co–

Jours:

bUI il

mull never be made red

hOI;

for (hen (he

texture of (he

m;¡rbJ~

¡t[eH

iojured...

nd the colour!

are burot, and loCe: their

bc:'ilUl

T oo [mall a d..:gree

of he,u is as bad as

tOO gre.H;

for

in this cafe (ho'

{he: marbJe receive

lhe

colcur, it will

nOI

be fixed in

it ,

nor

nrike

dE'ep coough. SOnle colour!

wiJl

Unke.

even cold;

UUt

(hey are never fo

\Vdl

funk in

whcn

• jun degree of he.. is ufed. The propcr d<grte is

tho\( which. \\

¡lhOllt

making lhe

marblc

red, \ViII mílke

lhe

liqunr boíl

upon

ils

furface. The

mentlruu.ns

ufcd

to thike

(he colours mu(l be

val

ied accordlng

the

nature of Ihe colour to be

uC~d.

lixivlUnl nl"dt: wHh

horre's or dog's urine, with four pans qui k lime. and

one pan pot-afhes is exceJlent (or fome colours;

comlnon Jye of wood-aChes does ver\, well for others :

for Come. Cpirit

\Vine is befi : and finally, for lIthers,

oiJy Ilquors, or commoo \\hile·wine

The colours which h:.ve bee:n found to fucceed bell

with (he peculiar menfiruums, are thefe: Hone blue

dilfolved in fix time .. lhe

qu ..

ntity of fpirit of wioe, or

of lhe urinolls lixivium: ¡¡nd

th ...

t colour \\ hlch lhe

painters cJI! 1¡lmous, diffolved

CtJmmon Iye of wood–

¡{hes

extr~a

of fafTron, "nd that colour made

of "urk;horn berries. and ·..

Jled

by the pJ.inters {ap–

greeo, hQ(h (ucceed wt:ll ddfolved in urine aod qUlck·

Jíme, and lolcr.tbly welJ in (piril of wine. Vermil·

lion.

~nd

a fi ne powder of co<.:hineal, Cucceed aIro very

well in Ihe rame Ilquon . D ragon's blood Cuccteds

ver) well in rpirie o[ wioe, as does alfo a llnaUre of

Jogwood in

th~

me fpint

..-\Ikanel ro01 &Ives ..

6ne

co!our. but the on!y m-:nnruum lO be ufcl1 for this

¡s

oil

turpcnl lnt:; for neither fpirit of wine. nor any

Jixivium. \Viii do

wnh

it.

There i!l anod,er kind of

fanguls dr ..conis, called dr"gon's blood in lears, which,

mixtd with unne ilfone, gives " very eleg;(O( c(,lour.

Bdict:.:s thefe mixwr\:s of colours and men(}ruums,

thae ..re Come coloul5

\A.

hich tire tO be laid

dry and

uOl1l1xed. Th(Ce art: ctltlgon's bJood,

the puren

kind, for a red ;

g"mbog~

lor

yellow; greeo

wax.

for a greeo ; common bnmllooe, pitch, and lurpentine,

for a t,rown

lour.

The

marble. for theCe experi–

ments, mull be mttde confiderably hot, and then the

colC'urs art

ubt·ed un dry

lhe lump. Sorne of

theCt' colours, wht!n once givt"o, remain immut ..ble ;

o,hers are caGJy changed or ddlroyed. T hus ,he

red colour giwen by dragon's blood. or by a decollion

of Jogwood, \ViII be wholly taken away by oil of taro

tar, and ,he poJifh of ,he marbJe no, huft hy i,.

fine gold colour is given in Ihe

(ollo~

ing manoer:

take crude Cal armoníac, vitriol,

:lOd

vcrdegreare, of

eaeh equal quantilies: white vitriol Cucceeds bel1 ; and

.11 md l be ,horoughly mlxed in line powder.

The {hining " f marblc

. 11

the degrecs of red or

yello\V, by folutions of dragon·s blood or g.mboge,

may be done by reducing the:re gums to powder, aod

grinding them. with tlle Cpirit of wine, in

gl..r::. mor·

lar; bu, for fm.!I" attenlpts,

melbod is ro /lood

O~.

lll. N°. 10.

as (he miKin,;:: a linle of either of the!'e powdcrs wilh

{pirit of \Vine in a filv -r Cpooo. and holding it ovcr

burning charcoal

this

m ....

ans

fine tiaélure wilI

be eX1.r"fted

and with a pencil dipped in IhIS, Ihe:

fineft traces may be miAde

lhe.

marble whilc cold,

which. on the healing it ;t(terw.uds either

fand ,

or in

:.t

oaker's oven, \\.ill

all

fink very deep, and le–

mr\in

perf~élly

dinlnél: in the none.

is very eJ(Y lO

make ..he ground colour of the marble red or yeJlow

by this ml!ans dnd leave whlte vdns

in it.

Thls is

be done: by covenng lhe places where the whltneCs

rc:main with Cume wbite: pAint, or even with two

or thr« double. only of p'p<r. either of which will

prevent (he colour troOl penetraling in tlut parto All

lhe: degrecs of red

a.re

given tO marhJe by meaas

of thls gUOl alune

a í1ight unéture or it, without lhe

allillance of h, a••

,he marble, gives onl)· a

p.le

fielh

colour,

" Uf

the fironger tinétures give il ye:t oeeper ;

thts the a(JiCl"nce of h· at

al~ds

yet greatly; and

fi ..

nalIy, lhe aJdition o( a hule pitch lO lhe tintlure gives

it a lendc:ncy

black.ners, or aoy degree of

dC,'ep

red

th..., is ddired . A blue colour may oe givcn allo

marbJe

di{fohing t.¡rnrol io a ltxi\'lum uf Itme aad

urine, or io (he volatill! rpirie of urlne; bl.H. this has

a1ways

tendt ncy

purple, whelher made

the

ooe

or the other of thefe ways .

better blue, and uled

ao t"afiermanner, is furnilhed by lhe. Canary turoro',

a {ubilance well kn?wn amoog the dyers

this nLeds

only to he dilfolved in water, aod drawn on the place

with a pencil: lhis penetrates very deep into lhe Olarble,

and the colour may be i:'creiACed by drawing the pencil

wetted ¡frdb feveral limes over the fame lines.

This

colour is rubj eél to rpread and dilfure itrelf irregular.

Iy; but il

Ol~y

bt' kept in

regul.tr

bounds, by circum..

{cribing its IlOes Wilh bLds of wax, or any olher fuch

rubll, nce.

P olifhing.f MAIBLES

i.perfornted by firn rubbing them

well

WIlh

a free Hone, or rand . till the firokes of (he

axe: 3re worn

off.

then wirh pumice nooe. aDd a[ter-.

wards widl e111ery.

Arundel-

RBL ES.

ancient marbles with a chronicle

lhe city of Athens iofcribed on them many years be...

fore our SiAviour's birth

prefeOled to the univerfity of

Oxrord by _Thomas earl of Arundel whence thenanu:.

MARBLlNG,

in general, ,he p.inting any thing wilh

vein! and c1ouds. fo .s

reprerent Ihote of marble.

Marbling of books or paper is perfomled thus: Dif.

{olve fou : ounces of gum ar.tbic into two quans of [¡¡ir

wate:r; then provide reveral colours mixed with WiA(cr

POIS 01"

Chells, ;tnd. with peocils peculiar to each co–

lour, Cpnnkle them by way of iOlcrmlxture upon the

gum-water, which

OIuH

be put ioto a trough or Jome

broad vdft.l; then with ¡¡ lIick curl tbem, or draw

them out

Clreaks,

as much varJety as Oldy be

done. H.ving done thil, hold your book or books

clore toged:er, Ilnd only dip lhe

~dJ.!f's

iD.

0 0

the

IOp

of lhe water

~nd

colollrs vcry lightly; which done

take thero off, and the pJain im prcllion of lhe co:

lours in mixture will be up"n

lhe

It3\'cs; doiog

wcll

the ends as lhe fronl of lhe book in

rhe

Ilke m,mner.

Afl er the

fame maoncl

}'OU

may

make

llurbJeJ

a ..

per,