EVB2936441: Standing obstetrical examination as illustrated in the 1822 medical classic Nouvelles Demonstrations D'ACCOUCHEMENS (DEMONSTRATION OF NEW OBSTETRICS) by Jacques Pierre Maygrier (1771-1835) . The physician depicted is thought to be a portrait of Maygrier himself / Bridgeman Images

EVB2936463: Patient having a cataract removed from his left eye by a surgeon whose assistant immobilizing the patient. Woodcut from OPHTHALMODOULEIA DAS IST AUGENDIENST, a 1583 book by Georg Bartisch (1535-1607) / Bridgeman Images

EVB2936467: Fully dressed female patient lying on the operating table, surrounded by the surgeons of Massachusetts General Hospital in one of the earliest operations performed under ether anesthesia. Among the surgeons is Dr. John Collins Warren, the doctor who first demonstrated surgical anesthesia / Bridgeman Images

EVB2936469: Ambroise Pare, the great 16th century surgeon, operating on a soldier wounded in battle. Pare developed surgical techniques and invented instruments for battlefield operations, and is considered a great medical innovator. c. 1550 / Bridgeman Images

EVB2937101: Five cadets at the U.S. Naval Academy, Annapolis, shooting pistols. July 1942 / Bridgeman Images

EVB2937123: Police confront a line of National Woman's Party pickets and seize their banners on Constitution Avenue, outside Senate Office Building in October 1918, Harris & Ewing (1905-45) / Bridgeman Images

EVB2937147: Young women in a tableau as ancient warriors perform at Seneca Falls, N.Y. seventy-fifth anniversary Equal Rights celebration on July 20, 1923. After the passage of the 19th Amendment granting women the right to vote, broad based feminist activist waned for forty years / Bridgeman Images

EVB2937173: Alvin Francis 'Creepy Karpis' Karpowic mugshots. He joined the Barker Gang after meeting Freddie Barker in Kansas State Prison and participated in the kidnapping of Edward G. Bremer. Karpowic was played by Giovanni Ribisi in the 2009 film, PUBLIC ENEMIES / Bridgeman Images

EVB2937243: Andrew Hamilton, Peter Zenger's (seated, upper right) defense lawyer, argues against his guilt for seditious libel against the colonial governor. In the crowded New York courtroom, he argued that his client was not guilty because the libel law protected the British monarch, not an appointed governor when words of the 'libel' were true / Bridgeman Images

EVB2937281: Librado Rivera (1864-1932) and Enrique Flores Magon (1877-1954), Mexican anarchists associated with Emiliano Zapata, and were part of the leftist intellectual faction of the Mexican Revolution, (1910-1920) / Bridgeman Images

EVB2937316: Newark, New Jersey. Aerial view, 1874 / Bridgeman Images

EVB2937335: Daisy and Violet Hilton (1908-1969), British born conjoined twins abandoned by their mother and trained as entertainers by their exploitive caretakers. They were trained to play clarinets for a jazz act in the 1920s. After breaking away from their caretakers, they toured in the U.S. sideshow and vaudeville circuit in the 1930s / Bridgeman Images

EVB2937301: Salem Witch Trial. Martha Cory in jail for witchcraft with her prosecutors. Allowed no legal counsel, she was convicted by 'spectral evidence' provided by the young Ann Putman. She maintained her innocence but was executed by hanging on Sept. 22, 1692 / Bridgeman Images

EVB2937376: Mao Tse-tung casts his vote , Beijing, 1953 (photo) / Bridgeman Images

EVB2937388: James A. Van Allen (1914-2006), American space physicist, discovered radiation belts surrounding the Earth and extending for several thousand miles into space. The Van Allen Radiation Belts were one of the first major scientific discoveries from Earth orbiting satellites in the late 1950s / Bridgeman Images

EVB2937404: Dr. V.K. Zworykin and Dr. James Hillier of RCA Laboratories at the electron microscope. Invented in the 1930, it exceeded magnification of optical microscopes. c. 1945 / Bridgeman Images

EVB2937632: Thomas Edison with the engineers and technicians of his Menlo Mark workshop. Edison is under the central arch, leaning against the support with his hands in his pockets. c. 1880 / Bridgeman Images

EVB2937444: Smog obscures view of downtown high-rises, Los Angeles, California on November 20, 1966 / Bridgeman Images

EVB2937669: A husband tunes the radio while his wife holds populist right-wing radio priest, Father Coughlin's newspaper SOCIAL JUSTICE, with a headline, STALIN ORDERS WORLD REVOLUTION. This comfortable middle class home was in Royal Oak, Michigan, where Father Coughlin was a priest. 1938 / Bridgeman Images

EVB2937673: Antennas on the roof of the U.S. Army Radio Station in Washington D.C. 1924 / Bridgeman Images

EVB2937501: Al Capone's luxurious Florida estate was cited as evidence of his extravagant life style during his 1931 tax evasion trial / Bridgeman Images

EVB2937697: Drillers excavating the dam foundation on the Nevada site of Boulder dam, excavating the dam foundation. 1933 / Bridgeman Images

EVB2937530: New York City's Manhattan's skyline shrouded in darkness, is offset by the lights of a freighter at a Brooklyn pier. On November 9, 1965, the lights went out for 12 hours in the Northeast States and Canada / Bridgeman Images

EVB2937540: Switchyard at TVA's Wilson Dam hydroelectric plant, near Sheffield, Alabama. A series of electrical transformers topped with ceramic insulators, transfer power from the generation system of the Wilson Dam to the distribution system that delivered power to consumers. 1942 / Bridgeman Images

EVB2937556: Gusher spewing oil from top of a derrick at the Lady Hunter Well near Petrolia City, Pennsylvania. c. 1880 / Bridgeman Images

EVB2937597: Ernest Orlando Lawrence (1901-1958), won the 1939 Nobel Prize for Physics for the invention and development of the cyclotron. c. 1935 / Bridgeman Images

EVB2937614: ECHO I, NASA's first communications satellite, was a passive spacecraft based on a Mylar balloon design. Launched in 1960, ECHO I expanded to a balloon with a 100 foot diameter that reflected radio transmissions from one ground station back to another / Bridgeman Images

EVB2937627: A hand cranked device onsisting of coiled metal wire and a magnet, demonstrates the principle elements of 19th and 20th century electrical generators, also called dynamos. Illustration from DYNAMO-ELECTRICITY, 1884 by George B. Prescott / Bridgeman Images

EVB2937655: 1849 model of the first commercially successful sewing machine. Invented by Issac Singer, it used the lockstitch patented by Elias Howe. Singer built the first sewing machine with verticle needle movement powered by foot treadle rather than a hand crank / Bridgeman Images

EVB2937660: Office of the Underwood Typewriter Company in Washington, D.C., c. 1910 / Bridgeman Images

EVB2937670: Little girl smiles as she enjoys a radio program in the 1930s / Bridgeman Images

EVB2937700: Sailors in the National Maritime Union hiring hall for deck and engine hands, watching the board where the jobs are posted. New York, c. 1955 / Bridgeman Images

EVB2937733: 'Evacuation Sale' sign on a Japanese-American store in preparation for World War II relocation. Internees were given little notice and forced to abandon or sell their businesses at heavy losses / Bridgeman Images

EVB2937772: Interior room of the Electric Telegraph Office at Charing Cross, London. British telegraph equipment was based on the Cooke-Wheatstone patent, the clock-like devices along the walls, in which the receiver pointed to the letters on a dial, which spared operators the task of translating code / Bridgeman Images

EVB2937722: President Dwight D. Eisenhower (1890-1969), in wheelchair at Fitzsimons Army Hospital, Denver, following his serious heart attack on September 24, 1955. Against his doctors' advice, he successfully ran for a second term in 1956 / Bridgeman Images

EVB2937797: Gustav Krupp von Bohlen (1870-1950), American born as Gustav Bohlen married Alfred Krupp's granddaughter Bertha in 1906, and Kaiser Wilhelm II immediately granted him the surname 'Krupp.' He ran the Krupp heavy industry conglomerate from 1909 until 1941 / Bridgeman Images