Galileo Galilei and time measurement: A re-examination of pertinent documents. (1963). "The scent of time: A study of the use of fire and incense for time measurement in Oriental countries" (Transactions of the American Philosophical Society, new ser). (1963). "Early American Scientific Instruments and Their Makers". United States National Museum Bulletin. (1964). The makers of Galileo's scientific instruments. (1964). "The Borghesi Astronomical Clock in the Museum of History and Technology" (United States National Museum Bulletin). (1966). "Mechanical Universe. The Astrarium of Giovanni de Dondi" (Transactions of the American Philosophical Society, New Series, Volume 56, Part 5.). (1966). Sundials and dialling: A bibliography of Italian and other references. (1966). Seventeenth century magnetic timepieces. (1969). "Benjamin Banneker and the survey of the District of Columbia, 1791". (Records of the Columbia Historical Society) (1971). The tube of long vision : (the physical characteristics of the early 17th Century telescope). (1971). The Life of Benjamin Banneker. (1971). Moon Man's Greatest Adventure (with Wernher von; Whipple, Fred L. and Thomas, Davis Braun. (1973). Thinkers and tinkers: Early American men of science. (1975). The Spotted Stones. (Library Binding - 1978). Introduction—the Vatican's astronomical paintings and the Institute of the Sciences of Bologna. (1980). Thinkers and Tinkers: Early American Men of Science. (1980). Th. Jefferson and science: Exhibition catalogue. (1981). Declaration of Independence Desk, Relic of Revolution. (1981). Thinkers and Tinkers: Early Men of Science. (1983). "At the Sign of the Compass and Quadrant: The Life and Times of Anthony Lamb" (Transactions of the American Philosophical Society). (1984). "The scientific instruments of the Lewis and Clark expedition", Great Plains Quarterly. (1984). Thomas Jefferson and His Copying Machines (Monticello monograph series). (1984) Clockwork cosmos: Bernardo Facini and the Farnese planisferologio (Studi e testi). (1985). Thomas Jefferson and American vertebrate paleontology (Virginia Division of Mineral Resources publication). (1985). Marshall's meridian instrument. (1987). Thomas Jefferson: Statesman of Science. (1990). The Christopher Columbus Encyclopedia. (1991). The pulse of time : Galileo Galilei, the determination of longitude, and the pendulum clock. (1991). "The Survey of the Federal Territory: Andrew Ellicott and Benjamin Banneker" (Washington History). (1991). Science and Instruments in Seventeenth-Century Italy (Collected Studies Series, Cs448). (1994). The Trail of Time : Time Measurement with Incense in East Asia, Cambridge University Press. (1994). Banneker, Benjamin (Encyclopedia of African-American History and Culture). (1996). "The Mace and the Gavel: Symbols of Government in America" (Transactions of the American Philosophical Society). (1997). Pope's Elephant: An