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60

COMPOSITION

OF

DRINKS,

ETC.

vessels, barrels,

tubs,

etc.,

are

to

be

removed

from

the

cellars,

and,

be

this

impossible,

the

disinfection

must

be

done

there.

The

percentage

of

alcohol,

as

far

as

it

is

not

due

to

blending,

is

in

closest

connection

with

the

quantity

of

sugar

in

the

must;

no

wine

can

contain

more

than

seventeen

vol.

per

cent,

of

alcohol,

as

with

this

degree

the

transformation

of

sugar

into

alcohol

by

fermenta-

tion

is

stopped,

and

any

surplus

is

caused

by

blending.

All

southern

wine-growers

are

fond

of

increasing

the

sugar

in

their

wines,

thus,

Australia

produces

hardly

any

wine

below

26%.

The

coloring

of

wines

offers

many

chances

for

adul-

teration.

Immense

quantities

of

white

wines

are

thus

made

red

wines,

and

even

liquids

that

can

boast

of

no

relationship

to

the

grape-juice

at

all

are

transformed

into

red

wines

by

coloring

materials.

Dyestuffs

mainly

used

for

this

purpose

are

:

berries

from

sambucus

niger,

sambucus

ebulus,

vaccinium

myrtillus,

ligustrum

vulgaris,

phytolacca

decandra,

the

flowers

of

wialva

arborea,

althea

rosea,

and

malva

silvestris,

beets,

logwood

and

Brazilwood,

cochineal,

indigo,

fuchsine,

and

other

aniline

colors.

Of

these

dyestuffs

the

aniline

colors

are

easiest

to

de-

tect,

while

natural

colors,

having

very

great

similarity

to

the

natural

dyestuff of

wine,

sometimes

render

it,

even

to

an

expert,

difficult

to

prove

their

presence.