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68

THE

COMPLETE

PRACTICAL

DISTILLER.

lessen

it

in

the

summer

;

and

in

all

cases

the

lob

must

be

put

to

fermentation

as

soon

as

its

temperature

is

fallen

to

110°.

Should

he

wait

longer,

he

is

exposed

to

have

the

whole

mass

spoiled

by

the

acetous

fermentation,

which

is

easily

developed

at

that

temperature.

During

the

sub-

siding

of

the

maceration

a

phenomenon

takes

place

which

has

for

its

object

to

saccharify

the

fecula

of

grain,

and

to

predispose

it

thus

to

fermentation,

which

it

could

not un-

dergo

without

it.

In

fact,

if

corn,

taken

in

a

raw

state,

was

simply

di-

luted

with

water

at

100°,

to

form

a

mixture

bearing

77°

of

heat,

the

most

proper

temperature

for

fermentation,

the

latter

would

never

be

developed

;

or,

at

least,

it

would

only

declare

itself

after

many

days,

and

that

with

very

little

intensity.

It

is

not

the

case

when

the

mashing

has

been

well

conducted

;

and

the

more

favourable

the

con-

ditions

under which

it

has

been

executed,

the

better

the

fermentation

will

proceed.

Mashing

may

then

be

con-

sidered

a

real

saccharification

;

and

if

we

remark

the

ana-

logy

between

the

saccharification

and

an

experiment

by

which

starch

has

been

converted

into

sugar,

by

means

of

water,

gluten,

and

a

temperature

of

145°

kept

up

for

twelve

hours,

the

saccharification

of

the

fecula

of

corn

during

the

mashing

will

easily

be

conceived.

In

fact,

all

grain

contains

gluten,

with

which

the

starch

is

in

immediate

contact.

Water

is

added

during

the

ope-

ration,

and

the

mixture

is

exposed

to

a

temperature

of

145°.

This

is

the

most

proper

temperature

for

mash-

ing;

by

this

heat

starch

is

converted

into

sugar

in

the

shortest

space

of

time.

Not

that

this

effect

could

not

be

obtained

at

a

lower

temperature,

100°,

for

instance,