Die graphischen Künste der Gegenwart

Goebel, Theodor

Bibliografische Daten

Monografie

Persistenter Identifier:: 157017248X

Titel:: Die graphischen Künste der Gegenwart

Weitere Titel:: ein Führer durch das Buchgewerbe

Autor:: Goebel, Theodor

Erscheinungsort:: Stuttgart

Erscheinungsjahr:: 1895

Umfang:: X, 241, 36 S., [179] Bl., [4] gef. Bl.

Sprache:: deutsch

Strukturtyp:: Monografie

Signatur:: 1Kb 737

Schlagwort:: Drucktechnik

Lizenz:: https://creativecommons.org/publicdomain/mark/1.0/deed.de

Fhe ad Chemical Notices from Foreign Sources. 05 position-by the permanganate undergo a process of gradual decidedly poisonous charader of these additions, and decomposition in the water, and that ammonia is one of demand the absolute suppression of the practice. the products of this process ?—I am, &c., Nitrification by Organic Ferments.—MM. Schlcesing M. M. Partison Muir. and Mintz.—The authors maintain that organic matter The Owens College, February 23, 1877. and ammonia are burnt in the soil by oxygen, under the mediation of organic germs. Certain Alterations in Glass.—M. V. de Luynes.— The author finds that certain glasses, after long exposure to light, undergo a change which causes them to ad upon polarised light in the same manner as tempered lass. If heated, a layer exfoliates, which is richer in silica than the interior mass. If this outer coating is broken, and water penetrates to the interior, the glass is soon destroyed. Phosphorescent Organic Bodies.—M. B. Radzis- zewski.—The author has shown the existence of well defined organic bodies—such as hydrobenzamide, amarin, and lophin—which are luminous in the dark if brought in contact with an alcohslic solution of potassa. Fermentation of Urine.—Dr. H. C. Bastian.—A reply to M. Pasteur’s last paper on spontaneous generation. M. Pasteur afterwards requested the Academy to nominate a commission to investigate and report, and expressed the hope that Dr. Bastian wouid make a similar application to the Royal Society. . Poisonous Character of the Salts of Copper.—M. Bergeron.—The author, in opposition to M. Galippe, de- :lares that copper, even if innocuous in minute doses, is a poison, and that verdigris is not admissible in articles of food. Means of Detecting Iodine in Cod-Liver Oil; and Experiments on the Absorption of Iodide of Potas~ sium by Fatty Animal Matters.—M. B. Barral.—The author burns the oil in a small apparatus, described and figured in his original memoir, and searches for the iodine in the aqueous produ@s of combustion. He finds by direct experiment ‘that the milk of herbivorous animals, submitted to an iodised diet, contains iodine not merely n the serum, but also in the fatty matter. Am rnp re CHEMICAL NOTICES FROM FOREJGN SOURCES. Nore.—All degrees of temperature are Centigrade, unless otherwise axpressed. Comptes Rendus Hebdomedaives des Seances, de I Acadeinic des Sciences. No. 6, Febuary 5, 1877. Oxide of Monochlorated Methyl.—M. C. Friedel.— The author finds that it is possible to form a stable group by replacing the chlorine in methyl-monochloric oxide with oxacetyl. Diathermanous Character of Metals and of Paper: —M. Aymonnet.—Metals and paper are not athermanous, as is generally supposed. They are more diathermanous for obscure heat emanating from metallic bodies raised to a jtemperature below 100° than for thermic radiations which are luminous or bordering upon redness. Their absorbent powers are lower than that of water. It is possible to find a mathematical relation between the absorbent power of a body and its coefficient of con- du&ibility, Presence of Free Ammonia in Cast-Steel.—M. P, Regnard.—On breaking up ingots of steel made on Pousard’s system the author noticed a very decided smell of ammonia. The odour was accompanied by a slight hissing, very distin& on holding the ingot to the ear. On covering the fracture with soap-water a froth was pro. duced. These phenomena were witnessed by several per- sons, especially MM. Troost and Hautefeuille. Effects of the Injection of Magenta into the Blood. —~MM. V. Feltz and E. Ritter.—~The authors find that che injection of pure magenta occasions paralysis, or con- vulsive agitation of the limbs. Mineralogical Structure and Composition of Vario- lite from the Durance.—M. A. Michel Levy.—Not adapted for abstraction. Determinations of Ammonia in the Air and in Meteoric Waters.-—M. A. Levy.—The methods employed by the author present nothing remarkable. Bulletin de la Societe Chimique de Paris, No. 12, December 20, 1876. Detection 1 of Magenta in Wines.—M. Fordos.— Second paper ; already noticed. Products of Condensation of the Ortho-Homo. logues of Benzol.—M. Bohuslaw Reyman.—A prelim- inary notice. Relation Between the Chemical Equivalents and the Absorbent Powers of Bodies for Heat.—M. Ay- monnet.—The author concludes that the absorbent atomic power seems to be constant—First, for simple bodies’ dis- solved in the same medium; second, for simple bodies forming part of compounds of an analogous chemical con- stitution, Heat, he considers, has only one way of propa- zation, from atoms to atoms. The following law is pro- dosed :—When the temperature of the source of a given 1ature rises, the absorbent power of the bodies submitted «0 the radiations of this source diminish all in the same oroportion. Dichlorated Naphthalin Corresponding to Nitro- naphthyl-sulphurous Acid.—M. P. Cleve.—The author has obtained the dichlorated naphthalin in question in flat needles, readily soluble in boiling alcohol, but sparingly in cold alcohol, and fusible at 107°. On analysis 36°12 per cent of chlorine was found, instead of the 36°04 which the formula requires. Determination of Arsenic by Standard Solutions. —MM. P. Champion and H. Pellet.—The process con- sists of the following operations :—Transformation of the arsenic into a sulphide ; solution of the sulphide of arsenic n ammonia, and saturation with acetic acid ; titration .he arsenic with iodine in presence of starch. No. 7, February 12, 1877. Researches on Thermic Specira (continuation).—M. P. Desains.—In a paper published in 1870 the author has shown that in the solar speGrum formed with an apparatus of rock-salt the heat which accompanies the luminous rays is about one-third of the total heat; on the other hand, in the speétrum of incandescent platinum it is a mere insig- nificant fraction. We arrive at analogous results with an apparatus of flint glass. The. difference does not dis. appear on tranamitting the rays of the incandescent meta) through strata of water of greater or less thickness. The spectra of the eleciric light are much more similar to those of the sun, as the heat extends even into the blue. A New Catalogue of Coloured Stars, and on the Spectrum of Schmidt’s Star.—P, Secchi.—In Schmidt's star, in the constellation Cygnus, the author has verified the brilliant lines of hydrogen and magnesium and the yellow ray of sodium. Adulteration of Food.—General Morin, M. Pasteur, and M. Damas insist that the presence of magenta in wines, and of copper in preserved vegetables, is to be con- sidered as a fraud, quite irrespective of the more or less

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