The miners' express. (Dubuque, Iowa) 1849-1854, 1853-11-30
IMPORTANT IMPROVEMENT IN MA
KING FLOUR FROM WHEAT

| Inc .HechanteS .fdgaziRc contains the fol-
lowing description of new invention for grin
ding wheat, and securing very much increased
quantity Of flour from the same quantity
of grain, than is now furnished by the
common fiat grindStones 1t is worthy the at
tention of nillers, ifit really does only half
| what is claimed for it, We see it stated that n
Committee Of the British House of Commons
reported that by this invention, 81 ,S57 100
quaricren loaves in addition TO those now made
from the same quantity Of wheat, would BE- pro-
duced. giving clear saving of upwards OF El,
| 100000 per year.
- On the 9th of february, large party of
engineering gentlemen, and Of others engaged
in an extensive way Of business, as mIlers, of
Messrs fasitt, High st, Mapping, TO witness
the performance oftwo mills constructed bv Mr.
Mid ileton, on the principle Of Westr p's patent
| In the same establishment are seven other mills
of the ordinary construction, and the trial Of
rtll'ive merits was between the two conical and
the most effective pair OF the flat mills. The
result proved TO be immensely in favor of the
conical system; while the quantity OF the article
Produced according to the opinion Inexperienced
bakers, is far superior
The economy of this new system of Grindn ,
Is found TO eject very sensiblv the detail of op
erations but in The mill and in the bake house
In the former, il becomes possible to grind I'D
ted in the form ofbran; that is to exhaust The
husk Of The clave more completely, and there
tore to yield larger quantity of pure farina -
In The later the tedious but critical duty of
watching for what is technically termed g the
sponge, rising of the dough is quite superse
ded. Al present, if this be negiec ed, the
dough falls again in the oven, and The bread is
sold at reduced price, which is serious dis
advantage,
Under the concal system of grinding, in
Consequence Of the greater portion of gluten
contained in The mats, the acids do not es-
cape 81 rapidly that the sponge takes place in
the oven.
Upon the whole, there is large gain for the
public; for b sides saving in fuel il is capable
OF increasing the bread of the people to the
value OF Il, 45J ,423 year which at Gil per
loaf would give them al ,S57, 100 more quartern
sloaves Il year.
The &" conical'' mill is intended t, ooviae
the defects of the fiat mill, ana a very few r.
marks will suffice to show tha, its inventor has
not only detected their causes, but has brou glIt
into operation most phi!osophc, and therefore
successful combination of grinding and separa;-
ing agencies, by which these defects have dis
appeared 10 an extent which leaves little to be
desired The beneficial changes may be sue
cinctly enumerated First, the reduction Of The
weight OF The running stone from Ia cwt. to l.
cwt. by placing il beneath instead of upon the
fixed one second the reduction of the size of
the stones in the proportion of 34 til; and
thirdly the giving to the stones a new form
that of the trustrum Of cone. The advlnta.
ges of lcssening the diameter and weight of
mass, OF which the one is cwt. and the other
IA cwt. will be apparent, when it is considered
that its effective velocity is 100 revolutions per
minute, and that this velocity must be sustained
an net fhp ba
admits of much more delicate adjustment of
the opposing surfaces, and gives to the miller
an easy and effective control over the most i'm
portant portion of the operation. The c0ncal
form facilitates the discharge ofthe -four and OBJ.
viates the clogging over heating of the old prac
tlce In addition 10 advantages, by judicous
modification of the ordinary mode of dressing,
or rather by combination Of the mil, with the
dressing machine; perfect separation Of the
flour from the bran is effected at the moment
the grist escapes from the stones. The bran
still remains in the mill, and falls by its own
gravity TO second p7ir Of stones in all respects
resembling those already described
Both pairs of stones are mounted on the same
spindle, and of curse impelled by the same
gearing. The operation of The lower pair need
not be described; they complete the process,
and leave nothing unconverted into -four which
could either add to the weight or the quality
Of the loaf In considering this arrangement,
we cannot fail TO be struck with the anology
subssting between it and that which we observe
in the construction of the jaws of animals-a
circumstance which assures us of its philoso
phcal superiority.
There were three trials as regarded the old
system and the new. The first experiment on
the old mill gave discharge of l6 lbs of -four
in five minutes, which was equal TO 1872 lbs. per
hour; while upon the patent mill there was a
discharge Of 3o4 lbs. in five minutes, or 462 lbs,
per hour. The difference, therefore, on that
experiment was against the old system Of 270
lbs. per hour. The second experim ,nt trial was
even more favorable as regarded the new sys-
TEN.
Two conica mills worked against two on the
fiat principle for one hour, ascertained exactly
and with the following results:
Conieal mill NO. y produced 81 bushels.
Do (No. y +" e 8.
Flat mill INA ~