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Form on an application and certificates for taking up lands in the old purchases, and east of the Allegheny river. James Dunlap. of the township of Derry, in the county of York, applies for three hundred acres of land, situate in said township a

Refutation. To the Democratic party of Allegheny County. A paper called the Aurora, and professing to be Democratic, having made a charge against me ... I published in the morning post, the following plain denial of the charge ... George R. Ridd

City dictation!!! To the Democrats of Allegheny County. You have doubtless heard of the nomination of George R. Riddle for the office of prothonotary, by the Democratic convention of August 30th on the 6th ballot ... Democrats! will you be base

Map showing the coal & timber lands of the Allegheny Rail Road & Coal Company with the avenues to market.

Map of Allegheny County, Pennsylvania, with the names of property-holders : from actual surveys /

First locomotive to cross Allegheny Mountains

Map of Allegheny Co., Pennsylvania : from actual surveys /

Plan of Allegheny Township.

Pennsylvania Railroad. Horse shoe curve, Allegheny Mountains

Pittsburgh & Allegheny, 1876

Map of Allegheny County, Pennsylvania : from actual surveys /

Allegheny County court house

[Group dressed for wedding(?) ceremony posed outdoors] / Perry, Allegheny, Pa.

[Music hall, Carnegie Library and music hall, Allegheny City, Pennyslvania]

[Reading room, view toward the delivery room, Carnegie Library and Music Hall, Allegheny City, Pennsylvania]

Map of Allegheny County, Pennsylvania, 1890 : with adjoining parts of Westmoreland, Washington & Beaver counties.

Lincoln's portrait in flowers, Allegheny Park, PA

Ground plan of the Carnegie Free Library, Allegheny, Pa

Verona & Oakmont, Allegheny County, Pennsylvania 1896.

Duquesne, Allegheny County Pennsylvania, 1897

Carnegie, Allegheny County Pennsylvania

Elizabeth and West Elizabeth, Allegheny County Pennsylvania, 1897

Duquesne, Allegheny County, Pennsylvania 1897.

Turtle Creek, Allegheny County, Pennsylvania, 1897

Elizabeth and West Elizabeth, Allegheny County, Pennsylvania 1897.

Carnegie, Allegheny County, Pennsylvania 1897 /

Wilmerding, Allegheny County, Pennsylvania 1897.

Turtle Creek, Allegheny County, Pennsylvania 1897.

Farm line map of Allegheny County, Pennsylvania /

[Allegheny Observatory, Riverview Park, Pittsburgh, Pa.]

[Allegheny River from Highland Park, Pittsburgh, Pa.]

[Allegheny County Soldiers' Memorial, Pittsburgh, Pa.]

[Allegheny Observatory, Riverview Park, Pittsburgh, Pa.]

[Allegheny Arsenal entrance, Pittsburgh, Pa.]

McKee's Rocks, Allegheny County, Pennsylvania 1901.

Tarentum, Allegheny County, Pennsylvania, 1901.

Pitcairn, Pa., Allegheny County 1901 /

McKee's Rocks, Allegheny County Pennsylvania, 1901

Glassport, Allegheny Co., Pennsylvania 1902.

Wilson and Mendelssohn, Pennsylvania 1902.

Allegheny Observatory, Riverview Park, Pittsburgh, Pa.

Rounding the bend, ascending the heavy grades (90 ft. to the mile) of the Horseshoe Curve, Penn. R'y, Allegheny Mts., Pa., U.S.A.

Allegheny College, Meadville, Pa.

Allegheny College, Meadville, Pa.

President Taft group at Allegheny Country Club

Allegheny College, Meadville, Pa.

Allegheny College, Meaville [sic], Pa.

Allegheny Co. [County] Soldiers' Memorial, Pittsburgh, Pa.

S.S. Allegheny, Wyandotte, Mich.

S.S. Allegheny, Wyandotte, Mich.

The Auditorium, Allegheny Co. [County] Soldiers' Memorial, Pittsburgh, Pa.

The Foyer, Allegheny Co. [County] Soldiers' Memorial, Pittsburgh, Pa.

Confluence of Allegheny and Monongahela rivers, Pittsburgh, Pa.

McArthur Advertising Corporation, 2480 16th Street. Allegheny Metal display at Union Station I

McArthur Advertising Corporation, 2480 16th Street. Allegheny Metal close-up

McArthur Advertising Corporation, 2480 16th Street. Allegheny Ludlum Steel display above Union News Company newsstand

McArthur Advertising Corporation, 2480 16th Street. Allegheny Metal display at Union Station IV

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Pittsburgh waterfront. Monongahela and Allegheny Rivers, Pennsylvania

Junction of the Allegheny and Monongahela Rivers to form the Ohio. Pittsburgh, Pennsylvania

One of the many bridges spanning the Allegheny River. Pittsburgh, Pennsylvania

Pennsylvania photographs - Farm Security Administration / Office of War Information Photograph.

Cars parked along Allegheny River, Pittsburgh, Pennsylvania

Pennsylvania photographs - Farm Security Administration / Office of War Information Photograph.

Back into production go these carloads of scrap metal, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa. The melting of alloy steels for defense work requires that steel mill scrapyards such as this be constantly filled. The overhead magnet deposits the scrap in a loader which carries it to the open-hearth furnace. About 50 per cent scrap steel is used in open-hearth production

Drill press operator, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa.

A tourist stop, Lookout Point, Allegheny Mountains, Pennsylvania

Bessemer converter (iron into steel), Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa.

White-hot steel pours like water from a 35-ton electric furnace, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa. The finest quality steels and alloys are produced in these furnaces, which allow much greater control of temperature than other conversion furnaces. The proportion of electric furnace steel is rising steadily, even though this process is the most expensive. "The furnace is tilted for the pouring." The flying sparks indicate the fluidity of the steel

Bridge and highway improvements, Allegheny County, Pennsylvania

Tourist and his wife looking at the view, Allegheny Mountains, Pennsylvania

Ladle of molten iron is poured into an open hearth furnace for conversion into steel, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa. Note the safety latch on the crane hook

Drill press operator, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa.

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Power for the wheels of defense industry. The throbbing heart of this plant where scrap iron and steel are convert into alloy steels for the national defense production program. Heavy wires carry current to the huge electric melting furnaces

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. General view of part of the plant where scrap iron and steel are converted into many grades of steel alloys. In the foreground are carloads of finished products, while in the middle foreground can be seen piles and cars of scrap coming in to feed the huge furnaces. In the background is the power house which supplies electricity and steam to turn the wheels of this important defense industry, set in the Pennsylvania hills about thirty miles north of Pittsburgh, one of America's most important steel producing centers

Posters in use. Office of Emergency Management (OEM) production posters displayed on the pay shack of the Allegheny Ludlum Steel Corporation in Brackenridge, Pennsylvania. The construction in the background is a new addition to the electric furnace building at the plant

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Workers here shown are completing the charge to an open hearth furnace which has a capacity of about 100 tons per heat. Only small quantities of materials are charged by hand in this way. The bulk of the material is charged by the mechanism shown in pictures nos. D-995 and D-994

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. The rapid tempo of expansion necessary to meet the ever-mounting needs of the national defense production program. In the left foreground a newly completed electric melting furnace is already in operation as a construction crew puts the finishing touches on the furnaces beyond it. In the background additional plant structure is still being built. Electric melting furnaces provide faster melting of the steel bath and more precise control of temperature which is necessary in the processing of high quality alloy steels

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Giant at rest. A repairman mends one of the huge ladles in which molten steel is conveyed from the electric furnaces to the ingot moulds

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Thirty-five ton electric arc melting furnace in operation. These furnaces convert scrap iron and steel into high quality steel alloys. This type of furnace gives much faster heating and permits the accurate temperature control so necessary in the processing of the high quality steels. The alloying elements are being added to the bath of molten steel

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Power for the wheels of defense industry. The stacks of the power house which generates all the steam required in this plant. The heavy wires in the foreground carry current to the electric furnaces used to convert scrap iron and steel into the many alloys required for national defense production

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Refined alloy steel in the electric furnace, ready for casting into ingots. The slag layer on top of the molten steel prevents the hot steel from oxidizing, thereby preserving its high quality. This is an operation that has rarely been photographed

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. A heated ingot of steel is removed from the soaking pit. In this pit ingots are thoroughly heated to the extremely high temperature required for conversion into slabs, billets or sheet bars for further conversion

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Power for the wheels of defense industry. The power house which generates all the steam required in this plant. The heavy wires in the foreground carry current to the electric melting furnaces

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Giant at rest. A repairman mends one of the huge ladles in which molten steel is conveyed from the electric furnaces to the ingot moulds

Posters in use. Office of Emergency Management (OEM) production posters displayed on the pay shack of the Allegheny Ludlum Steel Corporation in Brackenridge, Pennsylvania

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. The huge carbon electrodes of the thirty-five ton electric melting furnaces used in converting scrap iron and steel into high quality alloy steels. A worker is adjusting the rings that guide the electrodes into the arc furnace. This is just one of the new furnaces under construction at this plant to meet the expanding need for alloy steels under the emergency created by the national defenseproduction program

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Raw materials are charged into an open hearth furnace by means of this charging mechanism. The open hearth furnaces have a capacity of about 100 tons of steel per heat

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Converting scrap iron and steel into high quality alloy steel. A workman adds alloying materials to the bath of molten steel in one of the thirty-five ton electric arc furnaces. These furnaces give faster heating and more accurate temperature control than do open hearth furnaces