The following list of subject headings is used with the Chronology (right margin) as a guide to content. As with the Chronology itself, the list includes terms relating to disciplinary, and to organizational and social aspects of the history of science in America during the nineteenth century. In the Chronology, entries often have a combination of terms, e.g., "Organizations—Societies and Associations / Natural History" flags the founding of the Boston Society of Natural History in 1830.
  Acoustics
Aeronautics
Agriculture
Anatomy
Anthropology and Ethnology
Archaeology
Astronomy
Awards and Prizes
Biochemistry and Molecular Biology
Biology—General
Botany
Chemistry
Computers and Information Science
Conchology and Malacology
Disease
Earth Sciences—General
Ecology
Education in science
Electricity and Electronics
Embryology
Engineering and Applied Science
Entomology
Environment and Conservation
Eugenics
Evolution
Exploration and Surveying
Funds and Funding
General or Miscellaneous
Genetics
Geography and Cartography
Geology
Geophysics and Geodesy
Government—Federal
Government—State
Hydrology
Ichthyology and Pisciculture
Information Access
Instruments and Instrumentation
Mammalogy
Mathematics
Medicine
Metallurgy
Meteorology and Climatology
Microbiology and Microscopy
Military and War
Mineralogy and Crystallography
Mining
Natural History
Neurobiology
Nutrition
Oceanography
Organizations
Organizations—Academic
Organizations—Botanical Gardens
Organizations—Fairs and Expositions
Organizations—Foundations
Organizations—Hospitals
Organizations—Industry
Organizations—Medicine
Organizations–Museums
Organizations—Observatories
Organizations—Research Institutions
Organizations—Societies and Associations
Ornithology
Paleontology
Parapsychology
Pathology
Periodicals and Publishing
Pharmacology and Pharmacy
Philosophy
Photography
Physical Sciences—General
Physics
Physiology
Psychiatry
Psychology
Public Health
Religion and Theology
Seismology
Social Sciences—General
Sociology
Statistics
Surgery
Technology and Invention
Zoology
Zoology—Human