Unidentified photographer, 1854 (ca), Portrait of a gentleman, Daguerreotype, 1/6 plate, Archives of Modern Conflict OR National Gallery of Canada, LL/11404

Hank Walker, 1950, 1 August, Dazed US Army Corporal Roy Day Jr., with his hand to his throat, surviving massacre of 26 of his American fellow-prisoners after playing dead, Gelatin silver print, LIFE, Hank Walker/Time & Life Pictures/Getty Images, 50605550, LL/32234

Unidentified photographer, 1850 (ca), Portrait of a fisherman, Daguerreotype, 1/6 plate, Archives of Modern Conflict OR National Gallery of Canada, LL/11410

John Heartfield, 1932, The Meaning of the Hitler Salute: Little Man Asks for Big Gifts, [From AIZ (October 16, 1932), vol. 11, no. 42, front cover], Copper-plate photogravure, J. Paul Getty Museum, © 2006 Artists Rights Society (ARS), New York / VG Bild-Kunst, Bonn (The Getty Research Institute, Research Library, 87-S194), LL/8474

Unidentified photographer, n.d., Portrait of an elderly man sitting amidst a group of boulders at the base of a tree, Tintype, 1/2 plate, J. Cosmas Vintage Photography, LL/32642

William Carrick, 1860s (ca), Beggar, Carte de visite, Paul Frecker, LL/12101

Erwin Olaf, 2000, Marie-Antoinette + 1793, [Royal Blood], Digital Print on Kodak Professional Digital Paper, 8.5 x 8.5 in, OMC Gallery for Contemporary Art, LL/31087

Erwin E. Smith, 1908-1909, Waking a Night Rider. this duty of the early day cowpuncher, like many other, went out of practice with the coming of barbed wire and large pastures for holding the herd. [The "sleeping" cowboy is George Patullo.] Three Block Ranch, New Mexico, Gelatin dry plate negative, Amon Carter Museum, Erwin E. Smith Collection of the Library of Congress on Deposit at the Amon Carter Museum, Fort Worth, Texas (LC-S6-239), LL/11535

Moses Chapin, 1849 (or later), Frederick Warren, Worcester City Marshall, with handcuffed prisoner, Daguerreotype, 1/4 plate, American Antiquarian Society, Courtesy of the American Antiquarian Society (scan #003580-0125), LL/32376

Roger Ballen, 1992, Sgt de Bruin, Department of Prisons Employee, OFS, Catherine Edelman Gallery, LL/3808

Lewis W. Hine, 1920, Brakeman on Coal Train, Pennsylvania, Gelatin silver print, 4 5/8 x 6 5/8 in, Lee Gallery, Image courtesy of the Lee Gallery (www.leegallery.com), LL/3229

Margaret Bourke-White, 1952, 17 November, Decapitated North Korean Communist, Gelatin silver print, LIFE, Margaret Bourke-White./Time & Life Pictures/Getty Images, 3108907, LL/32228

William James Mullins, 1900 (ca), Ploughman in Landscape, Platinum print, 6.3 x 9.5 cm (2 1/2 x 3 3/4 in), American Art Museum, Smithsonian Institution, Museum purchase from the Charles Isaacs Collection made possible in part by the Luisita L. and Franz H. Denghausen Endowment, LL/7590

William Louis Henry Skeen, 1880-1895, Elephant and Keeper, Albumen print, Palinda Stephen de Silva Collection, LL/16260

August Sander, 1926-1932, Circus Workers, Gelatin silver print, 10.1 x 7.6, Andrew Smith Gallery, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/2493

Gabriele & Helmut Nothhelfer, 1974, Father and son at the Industrial Fair, Berlin [Besucher der Industrieausstellung 74], [Exhibition at "Bali-Kinoö in Berlin (Oct 1974)], Gelatin silver print, gold-toned, 21 x 29,5 cm (ca), Provided by the artists - Gabriele and Helmut Nothhelfer, LL/15788

Charles Nègre, 1853, Mar (before), Organ Grinder at 21, quai Bourbon, Salt print, from paper negative, 3 15/16 x 3 1/4 in, J. Paul Getty Museum, The J. Paul Getty Trust (84.XM.344.1), LL/7362

Wilhelm Höffert, 1894 (autographed), Therese Malten, German soprano as Brunnhilde - "Der Ring des Nibelungen", Cabinet card, Private collection of T. Max Hochstetler, LL/29175

Unidentified photographer, n.d., Young Hunter with Dog, Rifle and Rabbit, Daguerreotype, 1/6 plate, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (50 / 8), LL/22292

Keir Dullea, 1968, Astronauts, "2001: A Space Odyssey", Gelatin silver print, 11 x 14 in, Monroe Gallery Of Photography, LL/30431

Unidentified photographer / artist, 1971, 3 astronauts leaving the building to enter the vehicle that will take them to the capsule, [Apollo 15 NASA photographs], Color print, 8 x 10 in, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim (Auction: March 13, 2008, 51, part 2 / lot 101), LL/27754

Paul Strand, 1917, Photograph - New York, [Camera Work, no. 49/50, pl. 06], Photogravure, Hand-pulled, 8 3/4 x 6 5/8, Andrew Cahan: Bookseller, Ltd, LL/2022

George Anderson, n.d., Hilton's Corn Exterminator, Carte de visite, Christopher Wahren Fine Photographs, Courtesy of Christopher Wahren Fine Photographs (Skylight Gallery Catalog 27, October, 23, 2008 #64), LL/30961

Marie Sechtlová, 1964, Untitled, [New York], Gelatin silver print, Sechtl & Vosecek Museum of Photography, LL/32652

James Robertson, 1850s (late), Street merchant, Constantinople, Partially coated hand-coloured salt print, 19.5 x 15 cm, Bassenge Photography Auctions, Auction (17 June 2009, Sale 93, Lot 4266), LL/32472

Eugène Atget, 1910 (ca), Knife Sharpener, Albumen print, 22,5 x 18 cm, Bassenge Photography Auctions, (88 / 4104), LL/15722

Steve Schapiro, 1968, Photographing protestors at Anti-Nixon rally, Washington, DC, Gelatin silver print, 16 x 20 in, Monroe Gallery Of Photography, LL/30413

C.A. Gandy, n.d., Two British soldiers with a Gardner Machine Gun, Albumen print, Cowan's Auctions, Inc, Cowan Auctions, 2009, Spring Firearms Sale, April 29 - 30 (Lot: #122), LL/32124

Unidentified photographer (French), n.d., French military portrait, Cabinet card, Stereographica - Antique Photographica, Courtesy of Bryan and Page Ginns (#20 / 212), LL/31529

Gaulard (Marseille), 1920s-1930s (ca), Photomontage (multiple portrait), Gelatin silver print, 9 x 14 cm, Vintage-Photos, LL/32623

Unidentified photographer / artist, 1944, December (ca), Howard A. Wooten. (Graduated December 1944 from Air Corps School, Tuskegee, AL.), National Archives and Records Administration, [ARC Identifier: 512886], LL/1645

Gillian Laub, 2002, Aliza at Friends Memorial, Tiberias, Israel, Chromogenic print, 30 x 40, Bonni Benrubi Gallery, LL/3554

Shane A. Cuomo, 2004, 21 December, A Soldier from the 2nd Brigade Combat Team, 1st Infantry Division, guards suspected insurgents after an early morning raid in Al Shahabi, Iraq. This photo appeared on www.army.mil., Digital photograph, U.S. Army, Photo Courtesy of U.S. Army, LL/2061

Ellen Susan, 2007, 2LT Justin Roman, [Soldier Portraits], Ambrotype, 10 x 8 in, Provided by the artist - Ellen Susan, LL/29816

Thomas Smillie, 1890 (ca), Untitled [Portrait of a man wearing a helmet], Cyanotype, Smithsonian Institution Archives, Thomas Smillie Collection (Record Unit 95), (Image ID: RU95_Box78_0015), LL/32248

Reichard (Alliance, Ohio), 1890 (ca), Alliance Ohio police force, Gelatin silver print or platinotype, 7.5 x 9.5 in (image) 10 x 12 (matt), Christopher Wahren Fine Photographs, Christopher Wahren Fine Photographs - Auction (Skylight Gallery Catalog 28,April 30, 2009, #69), LL/32306

Unidentified photographer, 1900-1927, Photograph shows a group of Sudanese(?) warriors standing next to a seated officer., Photographic print, Library of Congress, Prints and Photographs Division, Frank and Frances Carpenter Collection [LC-USZC2-6347], LL/29785

August Sander, 1925, Police Officer, Gelatin silver print, 10.1 x 7, Andrew Smith Gallery, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/2464

Herb Snitzer, 1960, (Policeman and Boy and Girl), [New York], Gelatin silver print, 13 x 9 15/16, Barry Singer Gallery, LL/2997

J. Monstein, 1860s (ca), Fireman, Carte de visite, Paul Frecker, LL/12078

Dillon, 1870s, Fireman, Carte de visite, 4 x 2.5 in (102 x 64 mm), Carl Mautz Vintage Photographs, Courtesy of Carl Mautz, LL/11988

A. Aubrey Bodine, 1936, Five Fireman, Chloride print, 12 1/4 x 16 1/4 in, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (53 / 1113), LL/32272

Unidentified photographer, 1939, Firewoman with oxygen mask. The Netherlands, The Hague, Gelatin silver print, Nationaal Archief of the Netherlands / National Archive of the Netherlands, Spaarnestad Photo, SFA001001284_01, LL/32741

Photographer‘s Mate 2nd Class Jim Watson, 2001, 14 September, New York, N.Y. (Sept. 14, 2001) -- A fire fighter emerges from the smoke and debris of the World Trade Center., Color, U.S. Navy, Photo courtesy of U.S. Navy [010914-N-1350W-005], LL/2078

Unidentified photographer, 1848 (ca), Sister of Charity Serving Patient at the Hospice de Beaune, Daguerreotype, 1/2 plate, hand-coloured, 4 7/8 x 3 9/16 in, J. Paul Getty Museum, The J. Paul Getty Trust (84.XT.404.6), LL/7506

Lewis W. Hine, 1934, Red Cross Madona, Flood Relief, Gelatin silver print, 3.75 x 3.75, Andrew Smith Gallery, LL/2591

Alfred Eisenstaedt, 1954, Nurses, Roosevelt Hospital [NYC], Gelatin silver print, 25.3 x 19.6 cm (10 x 8 ), Galerie Johannes Faber, LL/1729

Tyler & Co. (Boston, MA), 1854 (ca), Portrait of a butcher, Daguerreotype, 1/9 plate, Archives of Modern Conflict OR National Gallery of Canada, LL/11406

Unidentified photographer / artist, 1860 (ca), Butcher with Rabbits, Ambrotype, 1/4 plate, Christopher Wahren Fine Photographs, Christopher Wahren Fine Photographs - Auction (Skylight Gallery Catalog 28,April 30, 2009, #21), LL/32287

Wells (Canton, NY), n.d., A butcher, Cabinet card, Capitol Gallery, Courtesy of Capitol Gallery (Spring 2007 Auction, #61), LL/17783

J.J. Reilly, n.d., #115 Chinese Butcher Shop, Sacramento Street, San Francisco., Stereocard, detail, Jefferson Stereoptics, Courtesy of John Saddy (Auction, Tue, Dec 12, 2006 & Thu, Dec 14, 2006, # 06-4, Lot 146), LL/15809

Giraudon's Artist, 1870s (ca), Man with walking stick, Albumen print, from wet collodion negative, 6 5/8 x 4 3/8, Charles Isaacs Photographs, Inc, LL/4163

Peter Henry Emerson, 1888 (ca), In the Barley Harvest, [Pictures of East Anglian Life, [no. 7]], Photogravure, 23.5 x 23.8 cm, Dominic Winter Book Auctions, Printed Books,& Maps, Vintage Photography (17 June 2009, Lot: 53), LL/32385

Irving Penn, 1971, Young Berber Shepherdess, Morocco, Gelatin silver print, 15 1/2 x 15, Afterimage Gallery, LL/1465

Hill & Adamson, 1844-1846, Alexander Rutherford, William Ramsay and John Linton, Newhaven, Scotland, Salt print, paper negative, 7 5/8 x 5 5/8 in, Lee Gallery, Image courtesy of the Lee Gallery (www.leegallery.com), LL/3227

Douglas (Edinburgh), 1870 (ca), Newhaven Fishwife (detail), Carte de visite, detail, Christopher Wahren Fine Photographs, Christopher Wahren Fine Photographs - Auction (Skylight Gallery Catalog 28,April 30, 2009, #37), LL/32294

Fritz Henle, 1947, Hawaiian Net Caster, Hawaii, Gelatin silver print, Harry Ransom Humanities Research Center at the University of Texas at Austin, © Fritz Henle Estate, Image courtesy of Harry Ransom Center., LL/31632

Jean Gaumy, 1998, Untitled (PAR140734), Gelatin silver print, 30 x 40, Bonni Benrubi Gallery, ® Jean Gaumy/Magnum photos, LL/3536

E.J. Bellocq, 1912 (ca), Untitled, [Storyville Portraits], Fraenkel Gallery, LL/4233

Henri Cartier-Bresson, 1934, Calle Cuauhtemoctzin, Gelatin silver print, 11 x 14 / 16 x 20, Peter Fetterman Gallery, LL/464

Louis Wegner, 1858-1858, Portrait of a monk, Salted paper print from wet collodion on glass negative, Mounted on paper, Rijksmuseum, Copyright © Rijksmuseum Amsterdam (RP-F-1994-23), LL/25769

Charles Leinack, 1860 (ca), Black boy being blessed by a priest [Garçon noir béni par un prêtre], Carte de visite, Private collection of Michel Mégnin, LL/29487

Unidentified photographer, 1905-1915 (ca), [Woman working machine tools], Real photo postcard, Private collection of Brian Smolens, LL/30551

Unidentified photographer, 1905-1915 (ca), [Man and machine], Real photo postcard, Private collection of Brian Smolens, LL/30200

Lewis W. Hine, 1925 (print) 2007 (publication), Powerhouse Mechanic, [An American Gallery], Book plate, Lumiere Press, Courtesy of Lumiere Press and Howard Greenberg Gallery, LL/27648

Bill Brandt, 1937, Northumbrian Miner at His Evening Meal, England, Gelatin silver print, 13 1/2 x 11 3/8, Barry Singer Gallery, LL/2775

Marion Post Wolcott, 1938, Coal Miner Waiting For A Ride. Each Pays 25 Cents A Week To Car Owner. WV, Gelatin silver print, 9.1 x 8.6, Andrew Smith Gallery, LL/2435

Alfred T. Palmer, 1942, October, This girl in a glass house is putting finishing touches on the bombardier nose section of a B-17F navy bomber, Long Beach, California, Color digital copy file from original transparency, Library of Congress, Prints and Photographs Division, LC-DIG-fsac-1a35360, LL/1661

Alfred T. Palmer, 1942, October, Part of the cowling for one of the motors for a B-25 bomber is assembled in the engine department of North American [Aviation, Inc.]'s Inglewood, Calif., plant, Color digital copy file from original transparency, Library of Congress, Prints and Photographs Division, LC-DIG-fsac-1a35314, LL/1663

H.G. Fetter, 1853-1854 (winter of), Surveying crew, Daguerreotype, 1/4 plate, Archives of Modern Conflict OR National Gallery of Canada, LL/11418

Lewis W. Hine, 1930 (ca), Surveyor, Maintenance of way (Empire State Building)., Silver print, 4 3/4x6 3/4 in (12.1x171.1 cm), Swann Galleries - New York, Courtesy of Swann Galleries (Auction, May 15, 2008, #2146, Lot 336), LL/28816

Alfred Eisenstaedt, 1932 (taken) 1990s (print), Ice Skating Waiter, St. Moritz, Silver print, 17 1/4 x 13 3/4 in (43.8 x 34.9 cm), Swann Galleries - New York, Courtesy of Swann Galleries (Auction, Oct 15, 2007, #2124, Lot 95), LL/23165

Eduard Isaac Asser, 1854-1855, Portrait of a labourer, Album (mounted on paper), Salted paper print from wet collodion on glass negative, Rijksmuseum, Copyright © Rijksmuseum Amsterdam (RP-F-AB12280-O), LL/25766

August Sander, 1926-1932, Master Mason, Gelatin silver print, 10.1 x 7.4, Andrew Smith Gallery, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/2491

Lesthevenon (Macon), 1860 (ca), Ferret Macon, Carte de visite, 6.3 x 10 cm, Vintage-Photos, LL/32635

Marc Riboud, 1955, Porteur de Bidons (Can Messanger), Beyrouth, Lebanon, Barry Singer Gallery, LL/2937

G. Eason & Co. (76 High St., Walthamstow), 1880s (ca), British Postman / [Mailman], Carte de visite, Private collection of Laurie Minor, LL/31387

Unidentified photographer, 1920 (ca), Berlin Tram Conductor: A young woman working as a tram conductor, Berlin, Gelatin silver print, LIFE, FPG/Getty Images, 83513216, LL/32221