Hundreds of inventions and inventors, biographies, pictures, indexes of inventions and inventors. The Women in Science site includes biographical information on about 125 women astronomers, physicists, mathematicians, chemists, natural philosophers, inventors, writers, etc. This beautifully designed PBS site is a companion to the new film by Ken Burns about the Wisconsin born architect. The DPI has declared a day in her honor, but this is the only good source for information on her. Free name searches will give brief genealogical records.
Source documents require a subscription.
Also a glossary of terms in English, French, German, Italian, Spanish, and Dutch along with over 500 illustrations for all the terms. A program presented nationally by Donald Litzer of McMillan Memorial Library. A librarian's list of best sites. The main genealogy discussion list Web site. The database can contain name, social security number, date of birth, date of death, and last residence when available.