Primary Source

Archives

Difference Engine No.1 Surviving Archives and Other  Sources Archives List
History by C.J.D. Roberts                                                   History of Difference Engine No. 1
Origin of Motion Charts for DE1                                                    Origin of Motion Chart for DE1
On the Mathematics of Babbage's First Difference Engine  Method of Differences
Benjamin Herschel Babbage's Manual to operate Difference Engine BH Babbage Manual
Marshall's Description of the operation of the 1832 Fragment Difference Engine  
Babbage's Difference Engine: How it was intended to work
Analysis of the Expenditure on Babbage's Difference Engine No.1
Letters from the Bromhead Collection
Letters etc. form the Forbes Collection
Croker Papers
Baron de Prony's Description of the Construction of Tables by the Method of Diffferences
Various Pictures of Babbage
Various Pictures and Graphics 
Maps and Plans

The Archival Research Catalog (ARC) is the online catalog of NARA's nationwide holdings in the Washington, DC area, Regional Archives and Presidential Libraries. ARC allows you to perform a keyword, digitized image and location search. ARC's advanced functionalities also allow you to search by organization, person, or topic.

The Museum offers three floors of exhibitions that explore the rich diversity of American history, from "First Ladies: Political Role and Public Image" to "America on the Move."

During the eighteenth and much of the nineteenth centuries, most Americans healed themselves, as their ancestors had for centuries. Professional medical assistance was either too far away, too expensive, or both. Even wealthy urban families usually attempted some sort of home health care before the doctor was called. This care was usually administered with the aid of books and pamphlets such as those discussed here and displayed in the exhibition.
Today these books are important for what they tell us about how medicine was practiced not in hospitals or laboratories, but in the home, where most practice took place, whether lay or professional. They are also important for the insight they provide into popular ideas about health as well as disease, about diet, exercise, prolonging life, sex, mental health - everything, in short, relating to our bodies and our selves. These concerns are universal, and books about them were ubiquitous then as well as now.

This is a study of New York City's most striking architectural entities,
its high-rise buildings -- or "skyscrapers" -- which have given the
city much of its nature and prestige and have in fact largely
formed the impression of this city in people's minds.

Only about six percent of the soldiers in the American Civil War were enrolled in the artillery branch of the service, yet the artillery played a pivotal role in almost every major engagement of the War. From the massed Union batteries at Stones River and Malvern Hill to the intrepid field work of Pelham's horse artillery at Fredericksburg, the big guns were always a factor, and often the decisive one. The purpose of this site is to acquaint the reader with basic information about the topic and provide some suggestions for further viewing and reading. Much of the focus is on the field artillery, which saw the most battle action during the War, but the growing Encyclopedia of Civil War Artillery provides examples of every type.

The Kennedy Space Center's Apace Flight Archives document the history of the American space program from the NASA Space Act of 1958.

Welcome! Desert-Storm.com is a site created to honor those who participated in Operation Desert-Storm. It is also intended to provide an informative resource about the war and the events surrounding it. Please take time to explore the entire site. Have a Great Day and Visit!!

Welcome to Give 'em Hell - The Story of the USS GUNNEL. The purpose of this on-line book is to detail the history of one World War 2 US submarine, the GUNNEL, from keel laying to scrapping. Each of the GUNNEL's War Patrols, 8 in all, has it's own chapter. There are also chapters on the boat's statistics, the attacks she made, the trip back to New London after the war, as well as many photos of the crew and boat

Welcome to what I believe is the only home page on the World Wide Web devoted exclusively to The United States Sanitary Commission 1861 - 1865. Of course, the Sanitary Commission is designed to include the Western and the Northwestern Branches. Also, there were so many Ladies and Soldier's Aid societies that they must be included as well. Even though there was no similiar organization in the South, there were Ladies and Soldier's Aid groups and they should be included. Having information from them available could make for some wonderful scenerios at reenactments.