We provide information about the history of Federal efforts devoted to public health, preserve and interpret the history of PHS, and promote historically-oriented activities across the U.S. Department of Health and Human Services, in partnership with the History Office of the Food and Drug Administration and the National Institutes of Health Historical Office.
Established in 1879 to build and organize a collection of scientific materials in the earth sciences, the U.S. Geological Survey Library is now the largest library for earth sciences in the world. The library system includes four libraries and is part of the Geographic Information Office of the USGS.
The United States Geological Survey (USGS) Library is the largest earth science library in the world. The library serves the research needs of USGS scientists throughout the nation and provides information to other organizations and individuals in the areas of geology, hydrology, cartography, biology, and related fields. USGS libraries are located in Reston, Virginia; Denver, Colorado; Menlo Park, California; and Flagstaff, Arizona. The site provides search engines for the library catalogue, USGS and other government maps, and the USGS minerals collection. Special Collections include field notes, photographs, sketches, logs, reports and maps dating from 1879. The page is broken down into useful sub-pages and is easily navigated.
Whether you are an academic, family historian, collector, teacher or parent - welcome! All the worthwhile information about old maps can be found here, or from here. The 100 'pages' of this carefully organised site offer comment and guidance, and many, many links - selected for relevance and quality
Last year saw two interesting events in the world of double stars, both of them connected with an astronomer's old friend in the Big Dipper. While the early history of double star astronomy had to be completely rewritten after an examination of 17th century Italian manuscripts, its future at the beginning of the next millennium was briefly unveiled by the amazing precision of a new astrometric instrument, which will soon eliminate the difference between spectroscopic and visual binaries.
This website contains material useful to people studying the history of the CA/T highway, especially the Charles River crossing part of the project. During 1998, we operated an interactive website for the purpose of collecting original material from people who were involved in planning the crossing. Some comments and articles contributed by people involved in the crossing design process are available on-line. Other material at this website includes a chronology of planning the crossing, a chronological bibliography of important transportation documents with links to some of these, and images. Hardcopy material pertaining to the crossing is available in the vertical file collection at M.I.T.'s Rotch Library.
This site presents a historical overview of the Massachusetts Highway Department's Central Artery/Tunnel Project for downtown Boston, known commonly as the "Big Dig." In particular, the site focuses on the northern part of the project linking Cambridge and Charlestown with Boston over the Charles River. Documents surrounding the planning, testing, legal wrangling and execution of the project are listed chronologically. The site also includes maps and other images relating to the project's development, and several recollections by transportation engineers, civil engineers and others who worked on the project and had to accommodate the conflicting interests of residents, builders and government planners.
Mathematics represents a high level of abstraction attained by the human mind. In India, mathematics has its roots in Vedic literature which is nearly 4000 years old. Between 1000 B.C. and 1000 A.D. various treatises on mathematics were authored by Indian mathematicians in which were set forth for the first time, the concept of zero, the techniques of algebra and algorithm, square root and cube root.
Welcome to the ENIAC Museum Online
Today the ENIAC is only 1/10th of its original size. It was announced on February 14th, 1946.
This site is organized into the following sections:
Three Preceeding Technologies
There were three existing technologies that led to the development of ENIAC.
Mauchly and Eckert
Learn about the inventors of the ENIAC.
The ENIAC in Action
Find out about the different parts of the ENIAC and more.
Speed and Money
That means the ENIAC was faster by a factor of 1,440. The cost to run a computer has dropped even faster.
Dawn of a New Age of Information
The success of Mauchly and Eckert inspired others to build improved computers. Every year, computers became smaller and less expensive.
We Love Computers
Explore the many ways computers help us become more productive, meet new friends, and have fun!
This was the first (but is not not the latest and greatest, for most purposes) online atlas of Mars. It lets you choose a site by various means and will show the locations (as footprints) of thousands of high-resolution Viking Orbiter images.
Founded in December 1904 by George Ellery Hale as one of the original scientific enterprises of the Carnegie Institution of Washington, Mt. Wilson Observatory is completing its first century as one of the world’s premier astronomical observatories. During the first half of the twentieth century Mt. Wilson was successively home to the world’s two largest telescopes as well as the most powerful facilities in existence for studying the sun
The invention of photography was one of the most significant events of the 19th century, irrevocably changing our perception of reality. "Here is a discovery launched upon the world, that must make a revolution in art," declared the New Yorker shortly before Louis-Jacques-Mande Daguerre's groundbreaking process was announced in Paris on August 19, 1839. This new technique of producing exact likenesses on a sheet of silver-plated copper soon became a sensation in the United States. Studios opened in every major city; itinerant artists traveled the countryside. Noted for their silvery, mirrorlike sheen, daguerreotypes framed the faces of the nation's great men and women, caught the spirit of Westward expansion and chronicled much of mid-19th-century American life.
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