This digital resource is a historical documentary edition. At its core are transcribed texts of handwritten documents, supplemented by contextual and explanatory apparatus. The edition draws on two categories of documents from Thomas Jefferson’s papers. The main body of the content consists of the record of daily meteorological observations he maintained, with gaps, from July 1776 to June 1826. In this period Jefferson noted weather conditions at 99 locations, including his home in Virginia, Monticello; Paris, France; Philadelphia; and Washington, D.C. Depending on period and location, the records at times include, in addition to the temperature and general weather conditions, details on barometric pressure, air moisture, wind direction and force, and amounts of rainfall or snow. Jefferson also occasionally noted information on ecology and seasons, such as the appearance of particular bird species in the spring or the first availability of produce, such as peas and strawberries. He sometimes supplemented his observations with information from newspapers and other sources about the weather in different locations and constructed comparisons of rainfall, snowfall, wind, and temperature over time. Surviving portions of these daily weather registers now reside in the collections of five institutions in the United States. They are in ledger books, written in the back of almanacs and financial memorandum books, or collected in folios.
The second category of source texts consists of other documents from Jefferson’s papers that relate to weather or climate and take a variety of forms, including summary tables, descriptive notations, and graphs.
In a departure from most editions of historical documents, the main body of the manuscript source material in this case consists of tables of numerical data and abbreviated text. To provide the fullest versatility in a digital environment, the site contains most of the information from Jefferson’s tables in two forms: exactly as he wrote them, even if inconsistent and incomplete; and as uniform, structured data that can be manipulated for use in computations and data visualizations. The George Washington Financial Papers Project, created by key team members of what is now the Center for Digital Editing at the University of Virginia, served as a conceptual model for aspects of this edition.
Project Director: James McClure
Host Institution: Princeton University
