16

Chemical Notices from Foreign Sources. {Css ar
Action of Phenols upon Halogen.substituted Fatty
Acids.—Dr. L. Laarbach.—Phenol and phenoloid bodies
1& upon halogen-substituted fatty acids in presence of
soda-lye in such a manner that the oxy (phenol, &c.)
-adicles are substituted for the halogen atoms. New
wids of great permanence are thus produced, the oxy->henyl-propionic,
 the oxythymyl-acetic and the oxysugenyl-acetic.
 The phenoxacetic acid of W. Heintz is to
se regarded as the first member of this series. Bibasic
shenols, such as orcin, ac in an analogous manner.
On the Plato-iodo-nitrates.—L. F. Nilson.—This
paper does not admit of useful abstraction.
Alleged Conversion of Albumen into Fat during
:he Ripening of Roquefort Cheese.—Nadina Sieber.—
The author shows that no such change takes place. A
part of the albumen is decomposed into leucin, tyrosin,
volatile fatty acids, and ammonia.
On Salireton.—P. Giacosa.—Salireton is a crystalline
vody, obtained by heating saligenin to 100° with equal
equivalents of glycerin, or with methylal, and in less
ibundance with mannite.
Behaviour of the Sugars with Alkaline Solutions
of Silver and Mercury.—Dr. F. Soxhlet.—This paper
loes not admit of useful abstraction.

Injury to Vegetation from Acid Gases.—Dr. ].
Schreeder.—The action of sulphurous acid is always intensified
 by heat, light, and moisture. Sulphurous acid is
always much more destruétive than hydrochloric acid, or
than an equivalent proportion of sulphuric acid.
Soft and Hard Water in Brewing.—E. R. Southly.
~The author pronounces that the value of calcium and
magnesium sulphates as constituents of water depends on
their promoting the clarification of beer, and on their anti.
septic ation.

Correspondenz-Blatt des Vereines Analytischer Chemiker.
No. 4, February 15, 1880.
Arsenophobia.—Dr. Ulex, of Hamburg, complains of
the exaggerated and sensational outcry which is being
raised concerning the alleged presence of arsenicin textile
fabrics, paper-hangings, &c. :
Modification of Classen’s Apparatus for Determining
 Carbonic Acid in Mineral Waters.—Dr. W.
Borchers.—Not capable of reproduction without the ac-:ompanying
 illustrations.
Determination of Glycerin in Beer.—V. Griessmayer.
—100 c.c. of beer are slowly evaporated in a flat capsule
on the water-bath at 65° to 75°; after expulsion of the
carbonic acid 5 grms. magnesic hydrate are added, and the
mixture is often stirred with a flat rod, so as to yield
finally a homogeneous tough semifluid mass, The evapo--ation
 is not pushed to complete dryness. The capsule is
then withdrawn from the water-bath, 50 c.c. of absolute
alcohol are added, and the mass with the stirrer is digested,
finally decanting into a large beaker. The residue is
stirred up with 20 c.c. of absolute alcohol, and filtered.
I'o the mixed liquids there are now poured, with constant
stirring, 300 to 350 c.c. of absolute ether, when a voluminous
 flocculent deposit of parapepton and maltose is
formed. The whole is filtered, washed with a little etheralcohol
 (3 : 1), and the filtrate is exposed to spontaneous
evaporation. The alcoholic liquid is then placed in a
glass capsule, evaporated on the water-bath to the consistence
 of a syrup, and placed in an exsiccator connected
with a water air-pump, so as to admit of rapid exhaustion.
After twenty-four hours the capsule is removed, digested
with 15 to 20 c.c. absolute alcohol, filtered through a very
small filter into a tared glass capsule, again evaporated
down on the water.bath, placed in the exsiccator, and
weighed after twelve hours.
Hofmann’s Eupittonic Acid as a Volumetric Indicator.—Paper
 saturated with an alcoholic solution of
eupittonic acid indicates 1 part of caustic soda in 89,000
to go,000 parts of water, whilst the best litmus paver does
not go beyond 1 part in 60.000.

Verhandlungen des Vereins zur Beforderung des
Gewerbfleisses. No, 2, February, 1880.
Lithium Glass.—Dr, Otto Schott.—Glasses composed
of a mixture of soda and lithia show a great power of resisting
 acids, and do not differ essentially from known
tcinds of crown glass, either in the absolute value of the
efraion or in the total dispersion. Lithium in glass
joes not serve as a substitute for the alkalies. but for the
1lkaline earths.
Processes of Griessmayer and Lallieu for Determining
 Glycerin in Beer.—Prof, C. Liebermann.— The
method of Lallien has a certain value if it is required
-apidly to prove the absence of glycerin in beer. It can
se used for an approximate quantitative determination
nly in the exceptional cases, when it is certain that the
‘mpurity is nothing but glycerin.

Gazzetta Chimica Italiana.
Anno ro. Fasc. 1. 1880.

C:ystallographic Examination of some Bodies of
:he Aromatic Series.—G. La Valle.—The bodies thus
described are tri-bromo-benzol, bi-iodo-benzol, mono-nitrochloro-phenol,
 and bi-nitro-iodo-benzol.
Further Observations on Digallic Acid.— U.o
Schiff.—A reply to the memoir (Gass. Chim., 9, p. 327 in
which the existence of artificial tannic acid is called in
juestion.
Contribution to the Chemical History of Stereosaulon
 Vesuvianum.— Prof. Michele Coppola.—Not
suitable for useful abstraction.
New Method of Determining the Melting-point of
Organic Bodies.—Dr. G. Roster.—The author's method,
suggested by that of Terreil, is to place the substance
directly upon the bulb of the thermometer, substituting for
iquid baths, or for the method of heating used by Terrei!.
1 bath of confined air.
On Podophyllin.—Prof. Icilio Guaresci.—The substance
 known as podophyllin is a mixture of two substances
1 glucoside and a resin. The glucoside is contained in
‘he portion insoluble in ether and the resin in the soluble
rart. The ation of melting potassa yields produés bennging
 to the aromatic series. The portion insoluble in
x her resembles in some of its chara®ers convolvuline and
.he turpentine of Spirgatis.

Yournal fiir Praktische Chemie.
Nos. 4, 5, and 6, 1880.
On Cyanamide.—Dr. G. Pritorius Seidler.—The oxyjuanidin
 hydrochlorate formed from hydroxylamin hydro-:hlorate
 and cyanamide has neither been obtained as such,
nor as a free base, but its platinum double salt has been
prepared. All further attempts were frustrated by the
instability of this salt. It was found pra&icable to obtain
cyanamides with acid radicles by the a&ion of hydrated
acids upon cyanamide. The dehydrating ad&ion of cyanamide
 is sufficiently energetic to decompose formic acid
into carbonic oxide and water, which latter converts the
cyanamide into urea. This experiment proves at the sane
time, that only water which is becoming chemically free,
is capable of converting cyanamide into urea ; as if steeped
in water for a length of time it yields not urea, but dicyand-amide.
 The results obtained by the a&ion of cyanamide
upon la&ic and salicylic acids are similar. With phenol,
the produds are not vrea and the ethyl-ether of phenol,
but dicyandiamide. With thiacetic acid the results aie
sulpho-urea and acetyl-sulph-urea.