Science Source ftp Apr 2015

Yerkes Observatory, Williams Bay, Wisconsin. Founded in 1892 by Charles Tyson Yerkes, the institution belongs to the University of Chicago. The big do...

Uraniborg, an astronomical observatory operated by Tycho Brahe in Denmark. Tycho Brahe (1546-1601) was a Danish astronomer. After becoming interested...

Tycho Brahe's sextant, which measured about six feet long on one side (AB). Tycho Brahe (1546-1601) was a Danish astronomer. After becoming interested...

Tycho Brahe's equatorial armillary, which was about 16 feet high and had its own enclosure in Brahe's observatory. Tycho Brahe (1546-1601) was a Danis...

Tycho Brahe's 10-foot azimuth quadrant, accurate to 1/240 of a degree. Tycho Brahe (1546-1601) was a Danish astronomer. After becoming interested in a...

A nushtur or incisor (left), which is an instrument used in India for making incisions in poppy pods; a poppy pod showing the vertical cuts made by ha...

Man smoking opium through an opium pipe. Opium is a narcotic drug obtained from the seeds of the opium poppy. It contains the chemicals morphine and c...

An opium den in China. The original caption from this 1899 photograph reads "Rich people have everything in their houses, including a room where they...

Postcard showing an underground opium den in San Francisco, pre-1906 earthquake. By 1896, there were around 300 opium dens in San Francisco, mostly in...

An engraving showing harvested opium poppy pods drying in the "drying room," at an opium factory in Patna, India. Opium is a narcotic drug obtained fr...

The plant on the left is an opium poppy. Opium is a narcotic drug obtained from the seeds of the opium poppy. It contains the chemicals morphine and c...

Opium den for a wealthy customer, who is enjoying his pipe in a private curtained alcove. The small objects on the left tray on the floor are shoes fo...

East India Company's warehouse workers in London, England. This print is called "Warehousing in the City" from "London a Pilgrimage" (1872) by Gustave...

Opium poppy. Opium is a narcotic drug obtained from the seeds of the opium poppy. It contains the chemicals morphine and codeine, as well as other alk...

An opium den in France. Illustration from "Le Petit Journal," 5 July 1903. Opium is a narcotic drug obtained from the seeds of the opium poppy. It con...

Saturn's rings observed by Christian Huygens in 1659. No one had ever seen Saturn this way before. Christiaan Huygens, (1629-1695) a prominent Dutch m...

Map of the Moon by the Polish astronomer Johannes Hevelius (1611-1687), published in 1654 in Selenographia, sive Lunae descriptio (Selenography, or A...

The only significant map of the moon made before the invention of the telescope, drawn by William Gilbert (1540-1603), physician to Queen Elizabeth I...

General panoramic view of Hiroshima after the bomb shows the devastation about 0.4 miles. Hiroshima, Japan. On August 6, 1945, a single nuclear bomb (...

Wilbur in Flyer II. The Flyer II was the second powered aircraft built by Wilbur and Orville Wright, in 1904. The design of the Flyer II was very simi...

Wright Brothers airplane on track, Big Kill Devil Hill, December 14, 1903. Orville Wright (1871-1948) and his brother Wilbur (1867-1912), were two Ame...

Orville Wright and Edwin H. Sines, neighbor and boyhood friend, filing frames in the back of the Wright bicycle shop. Orville Wright (1871-1948) and h...

Close-up view of damaged 1903 machine, rudder frame broken in landing, on ground at end of last flight. This photograph was taken after the fourth fli...

The Wright Flyer on the day of it's maiden voyage, The first flight, by Orville, of 120 feet in 12 seconds, at a speed of only 6.8 miles per hour over...

Hermann Volrath Hilprecht (July 28, 1859 - March 19, 1925) was a German-American Assyriologist and archaeologist. In 1882, he spent two months in the...

Henry Ford (July 30, 1863 - April 7, 1947) was an American industrialist, the founder of the Ford Motor Company, and sponsor of the development of the...

Luther Emmett Holt (March 4, 1855 - January 14, 1924) was an American pediatrician and author, noted for writing, The Care and Feeding of Children in...

Gustav Robert Kirchhoff (1824-1887) was a German physicist who contributed to the fundamental understanding of electrical circuits, spectroscopy, and...

Jonas Ferdinand Gabriel Lippmann (August 16, 1845 - July 13, 1921) was a French physicist and inventor, and Nobel laureate in physics for his method o...

Isaiah Lukens (1779-1846) American clockmaker and gunmaker. Lukens took over his father's instrument-making shop in Philadelphia, Pennsylvania and bec...

Charles Max Mason (October 26, 1877 - March 23, 1961) was an American mathematician. Mason was president of the University of Chicago (1925-1929) and...

Edward Maynard (Apr. 26, 1813 - May 4, 1891) was an American firearms inventor, most famous for his breech loading rifle design. He entered the United...

Ilya Ilyich Mechnikov (1845-1916) was a Russian biologist best known for his pioneering research into the immune system, for which he won the Nobel Pr...

John Muir (April 21, 1838 - December 24, 1914) was a Scottish-born American naturalist, author, and early advocate of preservation of wilderness in th...

Theobald Smith (1859-1934) was a pioneering epidemiologist and pathologist and is widely-considered to be America's first internationally-significant...

South Polar Expedition. Captain Scott and his exploration ship: Terra Nova circa 1910 and circa 1915. Robert Falcon Scott (June 6, 1868 - March 29, 19...

Nikola Tesla (July 10, 1856 - January 7, 1943) was a Serbian-American inventor, mechanical engineer, electrical engineer, and futurist. He was an impo...

Alexander Karl Otto Westphal (1863-1941), German neurologist. Westphal was the son of the eminent German neurologist Karl Friedrich Otto Westphal (183...

Max Carl Ludwig Wittmack (September 26, 1839 - February 2, 1929) was a German botanist. He was curator at the Agricultural Museum in Berlin, and super...

Abraham Jacobi (1830-1919) was a pioneer of pediatrics, opening the first children's clinic in the United States. To date, he is the only foreign born...

The Symbolical head, illustrating all the phrenological developments of the human head. Phrenology is the science which studies the relationships betw...

15th century illustration depicting a geographer with lodestone, by Stradanus. Lodestone is a naturally magnetized piece of the mineral magnetite that...

Fraunhofer demonstrating his 1814 invention, the spectroscope, a device used to examine properties of light. Photogravure from a painting by Richard W...

Period illustration of a man riding a Rover Safety Bicycle. This bicycle, which made its debut in 1885, is generally considered the first recognizably...

Early patent for an accelerator that made use of the charge-changing, or tandem, principle to double the energy of a beam of particles was awarded to...

Rosalind Franklin. Illustration of Rosalind Franklin (1920-58), British X-ray crystallographer. Her work producing X-ray images of DNA (Deoxyribonucle...

Rosalind Franklin. Illustration of Rosalind Franklin (1920-58), British X-ray crystallographer. Her work producing X-ray images of DNA (Deoxyribonucle...

Robert Hooke (1635-1703) was a British scientist who made numerous discoveries in fields as diverse as astronomy and microbiology. His name is remembe...

Robert Hooke (1635-1703) was a British scientist who made numerous discoveries in fields as diverse as astronomy and microbiology. His name is remembe...

Roald Engelbregt Gravning Amundsen (July 16, 1872 - June 18, 1928) was a Norwegian explorer of polar regions. He led the Antarctic expedition (1910-12...