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4C,I1, N(CH3),NO + C.H.Br, =

methyl alcohol reads 39.8°, all readings [C,H, (NO) N(CH2)2]C.H. +

being made at 20° C. 2C,H, (NO) N(CH2).HBr.

The detection of wood alcohol by this That is, the hydrobromide of nitrosodi- method is simple and consists in submitting methylaniline and a base formed from the to refraction the distillate which one makes union of two molecules of dimethylaniline for the determination of ethyl alcohol in the and the acetylene group are produced. The regular manner in beverages, essences, tincbase is proved to be tetramethyldiamido- tures, extracts or whatever may be the naglyoxine N-phenyl ether,

ture of the samples to be examined. If (CH3),NCH-V-CH-CH-NCH.N(CH2),.

the refraction of the liquid shows the percentage of alcohol agreeing with that ob

tained from the specific gravity in the The reaction can best be interpreted by regular manner, it may safely be assumed the assumption of the formation of an in- that no methyl alcohol is present. If there termediate addition product, from which is an appreciable amount of methyl alcohol, hydrobromic acid splits off easily. Diethyl- the low refraction will indicate the fact. aniline gives an analogous reaction.

Not only can methyl alcohol be thus readOn the Preparation of Various Acyl De

ily detected, but the amount may be deterrivatives of Dimethyl 4-Amino-o-phthal

mined, since addition of methyl to ethyl ate: M. T. BOGERT and R. R. RENSHAW.

alcohol decreases the refraction in direct On Some Nitro and Amino Derivatives of proportion to the amount present.

Fluorescein (preliminary notice): M. T. A Comparison of Methods for the DeterBOGERT and R. G. WRIGHT.

mination of Fusel Oil: E. M. CHACE and Researches on Pyrimidines: On 2, 5-Di

W. L. DUBOIS.

The general scope of the paper is limited amino-6-orypyrimidine: Treat B. JOHN

to the description and comparison of the SON.

Roese and Allen-Marquardt methods, no The True Benzaldehyde-azo-benzoic Acids: satisfactory results having been obtained by FREDERICK J. ALWAY.

the colorimetric method. The basis of the The Neutral Sulphite Method for Deter

Allen-Marquardt method is the separation mining Aldehydes in Essential Oils: S.

of the higher alcohols by extraction from S. SADTLER.

brine with carbon tetrachloride, their oxida

tion to the corresponding volatile acids by The Detection and Determination of Ethyl acid bichromate solution and their final

and Methyl Alcohols in Mixtures by the titration after distillation. It is regarded Immersion Refractometer: ALBERT E. by the authors of the paper as long and LEACH and HERMANN C. LYTHGOE. tedious, but more accurate than the Roese

The strongest commercial ethyl alcohol method. (91 per cent. absolute alcohol by weight)

A Crucible Method for the Determination gives a reading with this instrument of

: of Sulphur, IIalogens and Phosphorus 98.3° at 20° C., while the reading of

in Organic Substances: S. S. SadTLER. methyl alcohol of 91 per cent. strength by weight is 14.9°. Fifty per cent. ethyl Methods for Examinations of Cellulose alcohol by weight has a reading of 90.3°, Nitrate and Smokeless Powders: ALBERT while the same strength (50 per cent.) of P. Sy.

For purposes of classification and nam- The Formula of. Curcumine: C. LORING ing it is proposed to divide cellulose ni- JACKSON and LATHAM CLARKE. trates (as the nitration products of cel- The older formula C 4H,40, is shown to lulose are correctly called) into two classes, be in harmony with the analyses and is ether-alcohol soluble, and ether-alcohol supported by a determination of the molecinsoluble. Each product in each of these ular weight. classes is then designated according to its The Reduction of 5-Nitro-4-ketodihydronitrogen content expressed in percentage quinazolines to the Corresponding of dry material. After a brief description Aminoquinazolines, and the Preparation of cellulose nitrate manufacture, the of Certain Derivatives of the Latter: methods for examination were summarized M. T. BOGERT and V. J. CHAMBERS. as follows: (1) Stability tests: potassium- The Synthesis of 5-Nitro-4-ketodihydroiodide-starch test, German 135° C. test,

quinazolines from 6-Nitroacetanthranil ordnance department 115° C. test. (2)

and Primary Amines: M. T. BOGERT and Analysis: moisture, nitrogen, soluble

H. A. SEIL. (ether-alcohol), insoluble (ether-alcohol),

On Isomeric 0 and N Ethers Derived from soluble in acetone, cellulose, ash, alkalis.

2-Alkyl-4-oxy-5-nitroquinazolines and 2(3) Physical examination: compression

Alkyl-4-keto-5-nitrodihydroquinazolines: test, microscopical tests.

M. T. BOGERT and H. A. SEIL. Camphororalic Acid Derivatives: J. BISHOP Some Acyl Derivatives of Homoanthranilic

TINGLE and WILLIAM E. HOFFMAN, JR. Nitrile and the 7-Methyl-4-ketodihydro

The condensed formulæ AgHC,0C,H,4, quinazolines Prepared Therefrom: M. T. CuC,0,0,H14 and Fe(HC,0,C,H,.), rep

BOGERT and A. HOFFMAN. resent three types of metallic salts pre- The Condensation of Succinulosuccinic pared. With amines representatives of Acid Diethyl Ester with Guanidine: A four types of compounds have been pre Derivative of 1, 3, 6, 8-Naphtotetrazine, pared and their properties and constitution a New Heterocycle: M. T. BOGERT and studied; there is also a fifth class the con A. W. Dox. stitution of which is uncertain. The

The Methoxyl Group in Certain Lignocelamines from which the above-mentioned

luloses: ALVIN S. WHEELER. compounds were prepared were: a-naphthylamine, B-naphthylamine, p-toluidine, Influence of Dilution and of the Presence m-toluidine, benzylamine, diethylamine, of Lactose and Maltose upon the Osazone dimethylamine, methylamine, o-phenyl Test for Glucose: H. C. SHERMAN and enediamine, benzidine, nitrotoluidine, semi- R. H. WILLIAMS. carbazine, benzamidine, phenylhydrazine. Some Further Notes on the Possible ExistCertain other amines gave negative or un ence of Esters of Fulminic Acid: H. C. satisfactory results.

BIDDLE. Rosocyanine: C. LORING JACKSON and

Some Condensation Products of 1-PhenylLATHAM CLARKE.

naphthalene-2,3-dicarboxylic Anhydride: Rosocyanine has the same percentage

Norman A. DUBOIS. composition as curcumine. Its relation to On Monobromalkylketodihydroquinazocurcumine was discussed.

lines: W. F. HAND and M. T. BOGERT.

BIGELOW.

nou

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Some New Salts of the Nitrosulphobenzoic tively charged colloidal particles in the Acids: EDWARD HART.

water. Experiments are in progress on Adrenalin, the Active Principle of the the relative concentratioņs of colloidal sus

Suprarenal Gland: T. B. ALDRICH. pensions and electrolytes required for pre

The formula C,H 3NO3, first proposed cipitation and the influence of substances by the author, has been confirmed by vari. in retarding the coagulation. ous investigators. The structure, several

The Composition of Cooked Foods: W. D. details of which are certain, is possibly represented by one of the two following formulæ:

Artificial Digestion Experiments: EDWARD

GUDEMAN.
QH

OH
OH

As the result of a large series of artificial

digestion experiments with pepsin and CHOH CH, NHCH,

CHCH,OH

pancreatin on egg albumen with reference II.

to the interference of preservatives, colors, Compounds synthetically prepared on the

and condiments, the following conclusions lines of formula I. seem to be similar phys- are drawn: (a) Preservatives and condiiologically to adrenalin, but recent work ments do not interfere with peptic and by the author gives like evidence for II. pancreatic artificial digestion when in the The work is being continued.

proportion of 1 part to 400 or less, in acid

medium. (b) Acid preservatives and The Efficiency of Copper Foil in Destroy

condiments increase the factor of digestiing Certain Bacteria in Water: W. H.

bility in neutral medium. (c) In alkaline BUHI.IG.

medium the results are abnormal, retardSeveral sets of experiments, made along

ing the action of ferments. (d) Colors, the lines suggested by the recent work of

irrespective of source or origin, whether Moore, show that at incubator temperature

animal, vegetable, mineral or synthetic, do the typhoid bacillus disappears in a few

not affect artificial digestion when used in hours in the presence of copper, but at

quantities of 1 part or less to 400 parts of room temperature, in hydrant water, it

the food products. (e) Vegetable and persists several days. In the case of the

synthetic colors are directly digested in the colon bacillus the copper treatment has

same proportions by pepsin and pancreatin little practical value, but the dysentery

and the actual food value of both classes bacillus appears to yield quickly.

is the same. Colloidal Suspensions and their Relations Notes on Occurrence of Pentosans in Secto Problems in Water Purification: J.

ond Pressing Cider: J. A. LE CLERC and W. Ellms and J. F. SNELL.

L. M. TOLMAN. Turbid water show many of the properties of colloidal suspensions, e. g., the

Color Tests for Cod-liver Oil: W. D. BIGETyndall effect, migration of the turbidity LOW. under the influence of the electric current, The Presence of Hexone Bases in Bacteria: coagulation by electrolytes, etc. A possible MARY F. LEACH. explanation of the mechanism of coagula- Dried and pulverized bacteria belonging tion by sulphates of aluminum and iron is to the colon group were digested with the formation of positively charged col- thirty-three and one third per cent. sulloidal hydrates, which precipitate the nega- phuric acid for several hours, until the proteid was all decomposed. From the ex- growth of bacteria and their effect on the tract thus obtained, lysine was separated action of digestive ferments. as picrate, and the picrate transposed Experiments have shown that salicylic into the chloride. Both salts were iden- and benzoic acids in strong solution do not tical with the corresponding salts of lysine impede peptic digestion more than other prepared from gelatin and from fibrin. substances in a mixed diet, and that the Thus the presence of a hexone base in the feeding of these preservatives to guinea bacterial cell has been established, and one pigs and rabbits has no action on their more point of resemblance has been found growth or organs. It should be noted, between bacterial and other proteid. however, that the duration of the trial was

rather short, while the number of individThe Testing of Wheat Flour for Com

ual tests was small. mercial Purposes: HARRY SNYDER.

The points noted or discussed were: the Recent Work on Columbium and Tantalack of adequate standards for commercial lum: R. D. HALL. testing of flour; the difficulty of adopting on the Oxidation of Hydrazine: A. W. tests suitable to all types of flour; the in- BROWNE. fluence of total proteids on size of loaf and When a solution of hydrazine sulphate commercial grade; the application and is treated with hydrogen peroxide, potasvalue of gliadin nitrogen determinations; sium chlorate, potassium persulphate, amthe value of the ash results in determining monium metavanadate or lead dioxide in the grade of a flour or in detecting the acid solution, hydronitric acid is formed mixing of grades; the value of color in de- in very appreciable quantities. termining the commercial grade of a flour, In acid solution potassium permanganate and the influence of the bleaching of flours; and potassium dichromate oxidize hydraand the relation of high bread-making zine sulphate, forming in some cases a trace value to nutritive value.

of hydronitric acid, in others, none at all. The joint use of baking and chemical Certain other oxidizing agents, including tests was recommended. The chemical potassium iodate, bromine water and red tests can determine the grade, as patent, lead, yield no hydronitric acid whatever. straight or clear, while the baking tests can T he principal reaction involved in the determine the bread-making value of the oxidation of hydrazine sulphate is exsample.

pressed by the equation: The Occurrence of Extractives in Apple

N.H, +20=N, +27,0. Peel: H. C. GORE.

The equation for the reaction in which The Pectocelluloses of the Apple: W. D.

hydronitric acid is formed may be written BIGELOW and H. C. GORE.

3N,H, + 50=2HN, + 51,0.

The two reactions appear to take place The Analysis of Sugar Mixtures: C. A.

simultaneously. BROWNE, JR. (By title.)

In the light of this work it is apparent Chemical Preservatives Used in Food Prod that when an oxidizing agent is to be used

ucts. Are They Harmful? E. W. DUCK- in the quantitative determination of hydraWALL.

zine, or when hydrazine sulphate is to be Attention was drawn to the difference used in the quantitative determination of between the effect of substances on the an oxidizing agent, care must be taken to choose materials and arrange conditions, if University of Wisconsin.-(In addition possible, so that no hydronitric acid shall to work elsewhere reported on at this meetbe formed.

ing.) Dielectric constants of oleic acid, The error introduced by the formation oleates, etc. Difference of electrical potenof a given amount of hydronitric acid will tial between electrodes of the peroxides of obviously be greater if the analysis consist lead and manganese and various solutions. in the measurement of the nitrogen gas Study of alloys of tin with zinc and with evolved than if it consist in the determina- cadmium. Improved static method for tion of the unused excess of the oxidizing measuring vapor tensions of solutions. agent.

Equilibrium in the system silver nitrateThe Chemical Separation of the Radio- PS

pyridine. Numerous experiments on active Types of Matter in Thorium Com

osmosis, the details of which will soon be pounds: HERMAN SCHLUNDT and Rich

published. ARD B. MOORE.

Johns Hopkins University.— Composi

tion of hydrates formed in aqueous soluREPORTS FROM INSTITUTIONS.

tions by various electrolytes. Temperature This valuable feature was continued,

coefficients of conductivity of various thirteen institutions responding. It should

electrolytes. Condition of electrolytes in

mixed solvents. Electrical method for be borne in mind that the following ex

the combustion of organic compounds. tremely condensed summaries of the reports of work in progress during the past

Osmotic pressure of cane sugar solutions.

Electrolytic production of pure caustic year are, in most cases, far from exhaust

alkalies. Rate of oxidation of various ive. University of Pennsylvania.- Electro

aromatic compounds by potassium perdeposition of lead and mercury from salts

manganate. Chlorides of orthosulphoand metals, with the use of a rotating

benzoic acid. Camphoroxalic acid derivaanode; also, deposition of cadmium from

tives. Pinacone-pinacoline rearrangement. an ammonia solution, gold from cyanide

Harvard University.-Study of tetrasolution, etc. Methods for complete anal- brom and of tetrachlor-orthoquinone. Broysis of alkali halides, etc., with the use of mine addition products of dimethylaniline. a mercury cathode and silver anode. In- Atomic weights of sodium, cadmium, iodine vestigation of the compounds of colum- and other elements. Compressibilities of bium and tantalum.

elements and simple compounds. ElectroMassachusetts Institute of Technology. motive effects; electrostenolysis. Action - Electrical conductivity of aqueous solu- of potassium iodide on bromanil and tions at high temperatures. Conductivity chloranil. Action of phenyl hydrazine on of fused salts. Ionization of the successive various quinones. Action of ethylene dihydrogens of polybasic acids, as phos bromide on p-nitrosodialkylanilines. Oxiphoric, sulphuric and hydrogen sulphide. dation of organic compounds by air in presSystem of qualitative analysis including the ence of catalyzers. Determination of phosrare elements (now completed in outline phoric acid. Preparation of pure nitrogen with the exception of the rare earth group). on a large scale. Separation of electropositive groups and Lafayette College.-Salts of m- and ostudy of the properties of the metal-am- nitroparasulphobenzoic acids. Salts of moniums.

m-sulphonitrobenzoic acid. Constitution

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