Re ir ed Chemical Notices from Foreign Sources. 223
G. CiaMician, * Distillation of Resins and Resinous © Rheostatic Machine.—M. G. Planté.—This paper
Acids with Zinc Dust.” Aromatic bodies exclusively would be unintelligible without the accompanying illusresult
from the experiments, Abietic acid and colophony ration.
both yield toluen, ethyl-methyl-benzen, naphthalen, Action of Anhydrous Acids upon Anhydrous Bases
methyl-naphthalen, and methyl-anthracen. Gum-benzoin _)y, J. Béchamp.— (See page 221.)
gives rise chiefly to toluen, accompanied by small amounts D PN { R 2 ne s ined i
uf xylen, naphthalen, and methyl-naphthalen. Cc EE S Sgunive Sugar conizined in
E.v. SoMManuGa obtains by the ** Action of Ammonia ommersial >rodudts.— s Bir Olened 1 1s reductiv
on Isatine " under pressure, isatine-diamide, Cyst ;,N,0,, Rr pra anising in the sample is first determined directly.
vxy-di-imido-diamido-isatine, Ci6H;NO;, and desoxy- © : sm , after having Tsad to a boil 100 cc. of a well
imido-isatine, C16H yy N30, These compounds render it Segara SUpI-BoIasHic geen resisting this test, the
probable that the molecular formula of indigo, CsH(NO, withor pours into it quickly a known volume of the sac.
should be doubled. ! sharine solution, so large that a part only of the cupro-H.
Skraur gives for the “ Formula of Cinchoninv 013881 liquor may be decomposed. The mixture is hope
CigH22N20, as formerly asserted by Laurent, instead of un a boil for a minute or two, and as soon as the peat
the present one, CzoHyzyN,0, on the ground of a large tate of suboxide has taken the fine red tint characteristic
variety of analyses of the carefully purified base and its of the granular state it is thrown upon a rapidly-acting
salts.” ‘The amount of KMnO, requisite for oxidation to ilter, and washed with boiling water till the washings are
cinchotenin and formic acid 4 10 longer alkaline. The filter is then folded up, placed
! n a large platinum boat, dried rapidly over the gas-lamp,
CoH: N04 0, =C,3H,0N,04+CH,0,, ind burnt in the air. After cooling, the boat is reduced
: : : Bee Far ad abot ot me £
corresponds likewise to his formula, A base, CioHayN,0, id ® R00 Jo 0 ICES, 0 2 SUGEE 8) Bore ee:
was Separated from the vor Plate part of commercial saccharose taken together is effe@ed in the same manner
TG. NIEDERIST, “ eh of Warten on the Halogen Com- Wier inveruinn, Another puiion of ths saccharine sols
pounds of the Alcohol Radicals.” By heating with an '° sed wih ydemehiant 201d, lagt nthe watering)
. f H,O at ° th th Ya hanes thes iccording to the indications of Clerget, then diluted with
rompounds gS Ma corresponding. alcohols. methyl. water, and boiled for a few moments Sher dilution, is in
pero a a ~ -he same manner brought in conta® with an excess of the
lois into motad) slaahuls ailyl-lutide Sut allyl-alcohol, zupro-potassic liqaor, the suboxide is collected, washed,
L {bi prt ng oy ths debian of TINO; on 154, barat, and Jasrly redial by hydrogen, From the
Trimethyl-carbinol,” nitro-butylen, C(11,NO,, which forms So he weight of oY Teduttive mugar. L gm of
Y equ compound, C,HoNaNOy of an explosive .qyced copper corresponds to 0°569 grm. of reduive
i > 2 Berns 1 ; ; sugar. As for the weight of copper furnished by the second
A ET Bn of, Sine Slur ention, ie Havin deduced the weight coresponding
Rar Pie ’ a : o the pre-existing reductive sugar, and having applied to
produdt, CoHls0, possessing the Sharaflsietics of an aide- he remainder the proportional correction required by the
en PEI 2 ad HE . a Spectr the Chemi. lifference of the equivalents of redutive sugar and of
tt Diente pd their rs " ii the same zeelgse, " SIreion Je ereniad by 152, {he weight of
“ pe ' ¢ s aros 7 m alc i
conclusion as Lockyer, that the spe@ra of compounds, as Pn Ee ominin - 1¢ 8a he os d 4 ate 3
well as those of the first order of elements, consist exclu- edudtive ger Ss HR I pas In its
sively of bands; and, further, that the bands belong to Wy, Spon accharimetry.—M. H. Morin.—Not
molecules and the lines to free atoms. From a compara. 'dapted or abstraction. . LL
tive examination of the spectra of thirty-one elements the Produgion of Racemic Acid in the Manufacture of
author concludes that the lines in the spectra of chemically Cartaric Acid. —M. E. Jungfleisch.—-Without denying
allied clements correspond to each other individually hat certain vines may produce racemic acid under unor
in groups, each chemical group having its characteristic <nown conditions, the author holds that this substance,
Bpectra, the spectra of the various individuals differing from vhen met with in manufactories, takes its rise under the
each other in a change of position of homologous lines, ovint ation of heat and alumina, or an analogous oxide. ,
and the wave-lengths of these homologous lines corres. Certain Physical Properties of Quercite.—M.
ronding to the chemical power of the element, a greater runier.—An account of the crystallographic chara@ers of
wave-length accompanying a more intense chemical juercite, its action upon polarised light. and its specific
power. rravity.
CHEMICAL NOTICES FROM FOREIGN
SOURCES.
NoTe.—All degrees of temperature are Centigrade, unless otherwine
sxnresacd
Comptes Rendus Hebdomadaires des Sfances, de I! Academié
des Sciences. No. 18, OQober 29, 1877.
The Telephone of Mr. Graham Bell.—M. Breguet.
—A short iliustrated description of this instrument. The
author remarks that of all known telegraphs it is the one
which a&s under the influence of the feeblest currents.
Experiments on the Disruptive Dischage made
with a Chloride of Silver Battery,—MM. Warren de la
Rue and H. W. Miller.—An account of results, which
have been described in detail in a paper read before the
Royal Society.
Yournal fiir Praktische Chemie.
Nos. g to 13, 1877.
On Quinons.—E. Carstanjen.—The author has ren.
fered a valuable service to our knowledge of the stru@ure
»f quinons by preparing from cymene,—
Cet (CH3}(C3Hy)1.3,
1 quinon and an oxyquinon identical with those derived
from thymol, CeH;(CH;)(OH);(C3H,)1.3.4. Cymophenol,
the only isomende of thymol—
(position (CH3)(OH)(C;H;)1.2.4),
yields, upon being subjected to the same processes of
xidation, successively CioH30; and C;oH;03, comsounds
perfe@ly identical with thymo-quinon and oxyhymo-quinon.
The results would support the opinion
hat the oxygen atoms in quinons cannot occupy the
neta-position, and tend to show that they do not occupy
he positions of both the amido groups of the diamido
rompound from which oxythymo-quinon is dire&ly formed,
wt that the HQ group and one amido group unite to form
