The Ottawa free trader. [volume] (Ottawa, Ill.) 1843-1916, 1869-06-19
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Baron H.iebig's new Method Of
Breadth alxlng."

Baron Liebig has Just made some important 70
searches ON a new method Of bread making. He
remarks on the stationary character of this art.
which remains to the present day much in the
state in which it was thousands of wears ago.
He dwells upon the sanitary Importance Of the
mineral constituents OF grain, and the necessity
of sufficiently abundant supply Of them in
bread. These are best found In certain kinds of
black and brown bread, which are therefore,
better than the white bread that is never
theless preferred by most people Especially by
the lower orders, on account of it's better an.
pearance and superior palatableness. The pro-
blem has hence arisen, how to provide beauti-
full white bread which shall contain all the essen.
tial mineral constituents of black bread. These
mineral constituents phosphate of potash, lime,
magnesia, and from are introduced into tho
bread by the use of the baking powder invented
by Professor Horsford, of Cambridge, in North
America. This baking powder consists of two
powders--the one acid, the other alkaline. The
acid powder is phosphoric acid in combination
with lime and magnesia; the alkaline powder is
bicarbonate of soda. Two measures, made Of
timed iron, the larger one for the acid powders
and the smaller one for the alkali. are employed.
When bread is required to be made, every pound
OF -four is mixed with measure Of the alkali
powder, and sufficient water added to make
dough which is presently made into loaves and
baked. In one and half to two hours bread
may be made by this process The chemical
change which takes place will be easily intelli.
BILE; carbonic acid is generated and phosphate of
the alkali il formed at the same time The es-
sential feature ia Horsfords's invention is the
economical getting his phosphoric acid in the
shape of dry, white powder. This is done by
taking bones, burning them, and then treating
the well-burnt bone-earth (which consists Of
phosphate of lime and magnesia) with certain
quantity of sulphuric acid, 50 As to remove two.
thirds OF the lime and leave soluble superphos.
phste of lime. The sulphats Of lime which re.
suits from the action of the sulphuric acid is
separated from the rest by filtration, and the 30
luton subsequently, concentrated by evaporation.
and when it becomes very concentrated, mixed
with certain quantity of -four, and dried up
The mixture OF -four with the super phosphate
admits of being reduced to the finest powder,
and constitutes the acid powder just referred to.
1t will be observed that the alkali powder con.
tains soda whereas potash is required in order
TO furnish the right kind of mineral salts Liebig
proposes TO rectify this defect by using csrtain
quantity ofchloride Of potassium along with the
alkali. Chloride Of potassium Is now toiersbly
cheap. owing to the finding of immense quaint.
ties OF it at Strassfurt Baron Liebig, in order,
as he says, to avoid being bothered, has appoint.
ed Herr Marquart, Of Bonn, his agents for his
new baking-powder; and those interested may,
they like, get it from them.-British Medical
Journal