Cannon Nol Chemical Notices from Foreign Sources. 91
ladic acid ferment. In normal beer glycerin is found only it 1s accompanied with a considerable evolution of heat,
in small proportions, 0'27 to 0'28 per cent. Buxin, the which makes it necessary to cool the tube with flax soaked
bitter alkaloid of the common box-tree, has been detected in cold water, which is renewed from time to time.
in beer by Hager. Hofstedt has deteCted a case where Process for Detecting Nitric Acid in the Lemon
absynthin was introduced into beer by means of hops Juice of Commerce.—F. D, Scribani.—To dete nitric
adulterated with the extract of wormwood. acid in crude lemon juice it is sufficient to pour a small
Preservationof Wine by the Addition of Aluminium juantity into a test-tube, adding ferrous chloride in
Phosphate.—Bogdan Hoff.—The author added to twelve aqueous solution, strongly acidulated with hydrochloric
bottles of turbid wine respectively a variety of substances, acid, boiling the liquid for a few minutes, and testing the
among which was aluminium phosphate to the extent of solution with an aqueous solution of potassium sulpho-1}
 to 1 per cent. The bottles were then allowed to stand cyanide. If the juice in question contains nitric acid the
open from December 15 to April 14. The bottles con. liquid will take a blood-red colour, more or less intense
taining this addition remained perfedtly good, and tasted according to the proportion,
older by six years. The others were either covered with Chemical Researches on the Minerals and Rocks
mould or had passed into the acetic fermentation. In of the Island of Vulcano.—Prof. Alfonso Cossa,.—In
the wine treated with phosphate of alumina the acidity his first section of what promises to be a bulky memoir
had diminished. the author treats of potash-alum, containing alums of
On Testing Milk.—Prof. A. Kaiser and Prof. E. thallium, rubidium, and caesium.
Schulze.—The untrustworthy character of the indications Carbothialdinand other Sulphuretted Compounds,
afforded by the “cremometer” is pointed out. They _Prof. Icilio Guareschi.—Not suitable for abstraction.
place Se gross reliance upon the J" stall-proof.” I ;
the seller of a suspicious milk maintains that it is normal, : 7
the cows are milked the next day by persons in the em- Les i Hebdomadais des Sciences,
ployment of the authorities, and the sample thus obtained . © Iz, ny 11, 2 70- .
is compared with the one seized. (This method would _ Discovery of a Third Acid in the Reaction of
be of course utterly inapplicable in England, where much Sugar and Potassium Permanganate.—M, Maumené,
of the milk sold could not be traced back to the animals _-Diehic acid, C4H,Og, is easier to obtain, especially as a
from which it has been obtained.) neutral potassic salt, than the two others, the discovery
of which has been previously announced by the author,
. . . hexipic acid, CizH;016, and triejic, CsHgOyo. The
Geel Chums Teta, diehate of potassa is perfeétly ae forming large
. BSC. Vey O78, , and well-defined prisms. The solution scarcely precipi-Electrolytic
 Determination of Zinc, Lead, Anti- tates any metallic solution, not even neutral plumbic
mony, and Iron in their Ores and in Artificial jajts; it reduces the solutions of gold and silver, forming
Products.—G. Parodi and A. Mascazzini.—Reserved for jouble salts. The discovery of this new acid completes
more extended insertion. the study of the reaction of sugar with permanganate, no
Prismatic Sulphur from the Alcoholic Solution of other produc than the following being possible.
Ammonium Sulphide.—The cause determining the r,  Hexipic acid.
crystalline form of sulphur is not fusion or solution; not Triejic ,,
the quality of the solvent, but the temperature at which Diehic
the crystals are formed. + Dxalic
A Led&ure Experiment.—T. Brugnatelli.—Into a two- 5. Carbonic ,,
litre bottle, half full of cold water and saturated with car. Certain Consequences of the Constitution of the
bonic acid, is put ether, enough to form a stratum of a Solar Spectrum.—M. A, Cornu.—The author speculates
centimetre in depth. The bottle is closed with a caout. on the probability of direct magnetic action upon the sun, of
chouc stopper and violently agitated. When the space an internal terrestrial magnet, and of the eledric origin of
filled with compressed gas becomes transparent and the (he light emitted by the solar protuberances.
liquid tranquil the stopper is opened, when suddenly Scientific Instruments at the Paris Exhibition.——
there is produced a dense cloud, and tte sides of the A copiously illustrated description of scientific instrubottle
 are covered with a copious dew. The cloud and ments, most of them exhibited by MM, Ducretet.
the liquid are the proof of the fall of temperature.
Certain Derivatives of Tetrachloric Ether.—E. Chemiker Zeitung.
Paterno.—A claim of priority in reference to a paper by No. 30, July 25, 1878.
I. Busch inserted in the Berichte der Deutsch. Chem. Prof. Liebreich recommends hydrogen peroxide for the
Gesell., v., p. 415. preservation of milk.
New Researches on the Aldehydic Derivatives of Among the papers to be read at the Congress of German
the Organic Bases and of Urea.—Ugo Schiff.—Not Naturalists and Physicians, which will be held at Cassell
capable of useful abstracion, from the 18th to the 24th of September, may be men-Fasc.
 v.. 1878 tioned—* On Colour-sense and Colour-blindness,” by Dr.
; Ze Vor 2570 . . Stilling ; “On the Relation of Darwinism to Social Demo-Identity
 of the Usnic and Carbonusnic Acids.— cracy,” by Prof. Oscar Schmidt; * On William Harvey's
E, Paterno.—The author concludes that the acid extracted Life and A@&ivity,” by Dr. Baas, of Worms.
by Hessee from Usnea barbata (Hoffmann) and that ob- The pollution of rivers in the Kingdom of Saxony has
tained by Salkowski from Usnea barbata (Fries.), florida been investigated. The textile manufactures are debited
{Hoffmann) are usnic acid identical with that which he with 49 per cent of the contamination ; the leather trades
has studied and extracted from Zeora sordida. Usnic ith 16; mines with 8; the production of illuminating
acid, C;3H;60y, is an anhydride, and its monometallic agents with 4. In the distri@ts of Dresden and Bautzen
salts correspond to the formula C;3H;,MOs. :here are complaints concerning the waste-waters from
Preparation of the Oxychloride of Carbon—E., fax-steeping. . .
Paterno.—The author passes the mixture of chlorine and A brewer of Lindau, who had obtained from a Berlin
carbonic oxide through a glass tube of about 15 m.m.in a hedolitre cask of glycerin and 1 kilo. of salicylic acid,
diameter and 40 centimetres in length, filled with frag- and introduced them into his beer, was condemned to
ments of animal charcoal, . In presence of this substance twenty-one days imprisonment for fraud and to a penalty
the combination of the two gases takes place with great of 4000 marks {£200) for an evasion of the malt-tax. The
rapidity and without the need of the a&ion of solar light. vendors of the chemicals were fined £5 in each case.