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876,179-Stable Solution of Hydrogen Peroxide and Method of Making Same, Walter Heinrici, January 7, 1908.

The solution of hydrogen peroxide contains free acid and an admixture of organic amido-derivatives.

876,251-Substance for Removing Varnish or Paint, William H. Allen and William J. Weaver, January 7, 1908.

The compound consists of a ketone and benzol, a crystalline fatty acid and vaseline dissolved therein.

876,304-Finish-remover, Carleton Ellis, January 7, 1908.

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The remover comprises approximately denatured grain alcohol 85 gallons,

oil of acetone 14 gallons, amyl acetate 1 gallon, with which 10 pounds of Japan

wax and 5 pounds of ceresin wax have been incorporated to retard evaporation. 876,310-Process for the Manufacture of Isobornyl Oxalates from Camphene, Augustus Bischler and Anton Baselli, January 7, 1908.

The process consists in reacting upon camphene with anhydrous oxalic acid and separating the isobornyl oxalates from the reaction mass.

876,313-Process of Reducing Metallic Sulphides and Producing Vanadium, Frederick M. Becket, January 14, 1908.

The process consists in smelting a charge containing a metallic sulphide and a compound of silicon and carbon.

876,320—Chemical Fire-Extinguisher, Max Breslauer, January 14, 1908.

In this chemical fire-extinguisher the filling of the acid-container consists of a solution of phosphoric acid.

876,321-Chemical Fire-Extinguisher, Max Breslauer, January 14, 1908.

In this chemical fire-extinguisher the filling of the acid-container consists of anhydrous phosphoric acid.

876,330, 876,331, 876,332-Process of Making Incandescent-Lamp Filaments, Walter G. Clark, January 14, 1908.

876,346-Process of Precipitating Metals, John E. Greenawalt, January 14, 1908.

This process of precipitating gold and silver from their chloride or bromide solutions, consists in passing the solutions through a mass of metallic lead shavings formed by alloying one per cent. or less of zinc with the lead and then finely dividing said alloy, the solution being heated. 876,366-Composition for the Production of Ferrous Carbonate, Josiah K. Lilly, January 14, 1908.

The composition consists of a stable solution of ferrous sulphate and potassium carbonate in neutral liquid miscible with water and forming a protection against oxidation of the ferrous sulphate.

876,445-Electrolyte for Alkaline Storage Batteries, Thomas A. Edison, January 14. 1908.

The electrolyte comprises sodium or potassium hydrate, and about two per cent. of lithium hydroxide.

876,532-Finish-Remover, Carleton Ellis, January 14, 1908.

The composition consists of antimonyl chloride, benzol and wood alcohol. 876,583-Process of Tanning, George H. Pendleton, January 14, 1908.

The process consists in first introducing the hide or pelt into a bath containing a tannin and coloring material, allowing it to remain therein for a period of time, afterwards adding gum arabic, oil of hops and extract of cherry to said bath, and allowing the hide or pelt to remain in the final compound until tanned. 876,851-Process of Preparing Pure Lithium Compounds, Walter E. Wadman, January 14, 1908.

This process of preparing pure lithium compounds from solutions containing a mixture of lithium sulphate and potash sulphate, consists in adding thereto ammonia in an amount sufficient to render the potash sulphate insoluble.

876,862-Method for the Cementation of Steel, Cleland Davis, January 14, 1908.

The process consists in heating one face of, the solid plate to an approximately molten condition by means of a heavy current of electricity, and carburizing said molten face.

877,114-Method of Obtaining Oxide Fumes from Ores and Furnace Products, Hermann Pape, January 21, 1908.

The method consists in finely disintegrating the ore or furnace products, in mixing finely disintegrated carboniferous reducing means therewith, in making briquets of the mixture thus obtained, in feeding said briquets continuously into a furnace, in burning the carbon contained in said briquets in said furnace, in continuously supplying a powerful current of air to said burning briquets, whereby the volatile metals contained in said ore or furnace products are first reduced and then burned to oxides in the excess oxygen of the current of air, in continuously withdrawing said oxides with the furnace gases and in continuously removing the non-volatile residue of said briquets in a liquid state from the furnace. 877,171-Method of Manufacturing Metallized Electric-Incandescent-Lamp Filaments, Francis M. F. Cazin, January 21, 1908.

The method consists in coating or metallizing carbon-filaments, when bent into their final longitudinal shape, with a coat, deposit or layer or layers of metal in an electrolytic plating apparatus.

877,172-Method of Producing Filaments for Electric Incandescent Lamps and the Product of such Method, Francis M. F. Cazin, January 21, 1908.

The method consists in using a filament core bent in the linear shape, that the finished filament is intended to have, as one of the electrodes in an electrolytic plating apparatus, and coating the said core in the electrolytic-bath of the said apparatus with metal by the application of electric current, passing between electrodes through the electrolyte.

877,219-Printing-Ink, Marion E. McMaster, January 21, 1908.

The ink is formed in part of milk with which an antiseptic has been combined, the article having a spissitude approximating that of coagulated blood. 877,244-Method of Purifying Stannic Chloride, Elmer A. Sperry, January 21, 1908.

The method consists in heating impure stannic chloride substantially to boiling, thereby expelling chlorine and stannic chloride, cooling the vapors to separate stannic chloride, returning the separated stannic chloride to the body of liquid, and continuing the operation until the chlorine is substantially expelled from the body of stannic chloride.

877,246-Method of Effecting Reactions Between Solids and Gases, Elmer A. Sperry, January 21, 1908.

The method consists in agitating a liquid capable of dissolving the gas, introducing the solid in a heated condition into said liquid, and exposing portions of said liquids to the gas. 877,247-Method of Making Stannic Chloride, Elmer A. Sperry, January 21, 1908.

The method consists in maintaining a tin-bearing material in suspension in liquid stannic chloride, and bringing chlorine into contact with said liquid. 877,248-Method of Making Stannic Chloride, Elmer A. Sperry, January 21, 1908.

The method consists in reacting with chlorine on a tin-bearing material in presence of liquid stannic chloride, introducing moist chlorine beneath the surface of the liquid, and heating the chlorine inlet.

877,262-Method of Producing Stannic Chloride, Clinton P. Townsend, January 21, 1908.

The method is for purifying stannic chloride from chlorine, and consists in combining a portion of the chlorine with tin and expelling the uncombined portion.

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Copies of any paper marked with one or more asterisks will be supplied upon the following terms:

Papers marked (*) for 25 cents, postpaid.

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In writing give full title of paper and where found. Stamps will be accepted. Send orders to CHEMICAL ENGINEER INDEX EDITOR, NAZareth, Pa.

The publishers would like to call attention to several things in connection with this index. First of these is the fact that it is desired to be a complete catalogue of all the important articles upon analytical and applied chemistry appearing in the current issues of the more important scientific and trade journals of this country, England, France and Germany.

We are in position to secure for our subscribers at reasonable rates translations of any articles appearing in French or German journals. When a sufficient number of our readers notify us that such is their wish, however, we will have the desired article translated and published in THE CHEMICAL ENGINEER.

As to the best way of making use of the index we have this to suggest: The index is not only intended to keep our readers posted on what is appearing in the other journals, but also to serve as a permanent record of the literature of applied chemistry. To the latter end it is better that all the articles on one subject be grouped under that head rather than scattered throughout the several monthly indexes. This can be done in several ways. It will be noticed that the pages are backed by advertisements; they may, therefore, be cut out of the magazine without mutilating other contents, cut apart and each item pasted on a separate card. These cards can then be arranged between proper guide cards in a tray or a drawer cabinet. While this would require a little time each month to cut out the items and paste them on cards or in a scrap book, such an arrangement of all correlated matter under one head would save much time ultimately in looking over all the numbers for articles on a particular subject. This would also admit of a rearrangement of the items to suit the ideas and needs of each individual.

Below is a list of the journals regularly read and indexed for THE CHEMICAL ENGINEER each month. For the convenience of our readers, after each of the American journals are given its publishers, their address and the price of a single copy. In giving the reference to the volume, number and page of a journal, the volume is printed in Roman numerals, the number in bold face and the page in ordinary face Arabic numerals.



American Chemical Journal, Johns Hopkins Press, Baltimore, Md.
American Journal of Pharmacy, 145 N. Tenth St., Philadelphia, Pa.
Cement, Progress Pub. Co., 13-21 Park Row, New York.

Cement Age. 42 Broadway, New York.

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The simplest but also the least economical method of conveying material from one operation of a manufacturing process to another is the man with the wheelbarrow. An ordinary wheelbarrow with a steel tray weighs from 55 to 70 lbs. and will hold about two cubic feet of material when heaped up. A laborer in wheeling travels at the average rate of 200 feet per minute and loads at the rate of about two cubic feet per minute, depending somewhat upon the weight of material. About one-quarter minute is lost in dumping the barrow, resuming the shovel, etc. If, therefore, it is necessary to convey 100 tons of coal 50 feet in 10 hours, six men will be required. For, assuming coal to weigh 55 lbs. per cubic foot, a barrow load would consist of 110 lbs. and would require one minute to load and one-quarter minute to dump, etc. At a speed of 200 feet per minute, the time consumed in wheeling the full barrow and returning with the empty one would be one-half minute. Hence to load a barrow with 110 lbs. of coal, wheel and dump it and return with the empty barrow to the pile would require 1 + 4 + 1⁄2 134 minutes. One man can therefore convey 110 lbs. of coal 50 feet in 134 minutes, or 3,772 lbs. in an hour. To 100 X 2000

convey 100 tons in 10 hours, therefore,

3772 X 10

5.4 men will be

needed. With heavy materials a barrow load may be considered as 175 lbs. Such loads may be pushed over rough ground or up slight inclines.

Larger wheelbarrows having two wheels, the latter placed well under the tray, and holding as much as 9 cubic feet (or 500 lbs. of bituminous coal) are also made. As these barrows themselves weigh something like 200 to 250 lbs., they are only suited to use on hard, level, smooth surfaces. When used on the ground, runways made by bolting sheets of steel together endwise should be used. These barrows are much employed for bringing coal short distances to the boilers, or for conveying light substances about

*Copyright, 1906, by The Chemical Engineer Publishing Company.

the plant. The advantage of these large barrows is in the saving of time consumed in making the trip. For instance, if loaded with 8 cubic feet of coal, in the example given in the preceding paragraph, one man should convey 5,558 lbs. 50 feet in an hour.

Barrows with a round funnel-shaped nose are sometimes used where material has to be dumped into a small, round opening, such as the mouth

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Fig. 1-Charging or Soda-Ash Barrow. Fig. 2-Oven Charging Truck.

of a furnace or oven. When dumped the nose fits into the opening and forms a sort of funnel, preventing the material from being spilled around outside the latter.

The charging barrow is shown in Fig. 1. It was formerly much used in metallurgical work and is still used in even large chemical plants. These barrows hold from 10 to 20 cubic feet and themselves weigh from 325 to 450 lbs. Over a fairly smooth surface about 900 to 1,000 lbs. is the greatest load an ordinary man can handle with them. When employed where mate

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Fig. 3-V-Shaped Dump Car. rial has to be elevated, it is usual to wheel the barrow onto a platform elevator and lift barrow and contents to the higher level where the barrow is pushed by hand to the desired point. Another plan is to dump the material into the boot of a bucket-elevator and carry the material by means of this to the higher level, where it is dropped by spouts or conveyed by means of cars, barrows, or conveyors to the desired point. This latter plan is not suited to material in lumps of over 4 or 5 inches in diameter. Charging barrows may be lined with acid-proof enamel paint or with sheet lead

Fig. 4 Gable or Saddle Bottomed Dump Car.

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