Subject- Natural history.
(78)
- Botany.
(37)
- Indians of North America--Languages
(30)
- Medicine.
(29)
- Astronomy.
(25)
- Voyages and travels.
(21)
- Indians of North America
(19)
- Slaves, slavery, slave trade
(16)
- Geology.
(15)
- Abolition, emancipation, freedom
(13)
- Delaware Indians
(13)
- Meteorology -- Observations.
(13)
- Chemistry
(11)
- Zoology.
(11)
- Agriculture
(10)
- Eastern Woodlands Indians
(10)
- Science -- Societies, etc.
(10)
- Mathematics.
(9)
- Paleontology.
(9)
- Commerce.
(8)
- Exploration
(8)
- Iroquois Indians
(8)
- Ojibwa Indians
(8)
- Ornithology.
(8)
- Social conditions, social advocacy, social reform
(8)
- Cherokee Indians
(7)
- Mayan languages
(7)
- Meteorology.
(7)
- Mineralogy.
(7)
- Physics.
(7)
- Science.
(7)
- American Philosophical Society
(6)
- Birds.
(6)
- Cakchikel language
(6)
- Choctaw Indians
(6)
- Indians of North America--Treaties
(6)
- Land speculation
(6)
- Learned institutions and societies.
(6)
- Louisiana Purchase -- Discovery and exploration.
(6)
- Military supplies.
(6)
- Natural history
(6)
- Plants -- Collection and preservation.
(6)
- Slavery -- United States.
(6)
- Agriculture -- United States.
(5)
- Botany
(5)
- Delaware language
(5)
- Eclipses.
(5)
- Electricity -- Early works to 1850.
(5)
- Electricity.
(5)
- Evolution (Biology)
(5)
- Geometry.
(5)
- Horticulture.
(5)
- Mineralogy
(5)
- Race, race relations, racism
(5)
- Science and technology
(5)
- Seneca Indians
(5)
- Stamp Act, 1765
(5)
- United States--History--Revolution, 1775-1783
(5)
- Algonquin language
(4)
- Botany -- England.
(4)
- Chickasaw Indians
(4)
- Creek Indians
(4)
- Education
(4)
- Electricity
(4)
- Entomology.
(4)
- Evolution.
(4)
- Germantown, Battle of, 1777
(4)
- Indians of North America--Government relations
(4)
- Indians of North America--Missions
(4)
- Indians of North America--Pennsylvania
(4)
- Indians of North America--Social life and customs
(4)
- Legal documents.
(4)
- Linguistics
(4)
- Linguistics.
(4)
- Mesmerism
(4)
- Military history, Modern -- 18th century.
(4)
- Mollusks.
(4)
- Osage Indians
(4)
- Philology.
(4)
- Physicians
(4)
- Physics--Early works to 1800
(4)
- Plains Indians
(4)
- Plantations
(4)
- Real property -- Pennsylvania.
(4)
- Religion
(4)
- Scientific apparatus and instruments.
(4)
- Scientists -- Great Britain.
(4)
- Sermons, Cakchikel.
(4)
- Shells.
(4)
- Slavery -- Pennsylvania.
(4)
- Society of Friends--Missions
(4)
- Weather.
(4)
- Weights and measures.
(4)
- Wyandot language
(4)
- Yellow fever--Pennsylvania--Philadelphia
(4)
- Algebra.
(3)
- Animal magnetism.
(3)
- Architecture
(3)
- Banks and banking -- United States.
(3)
- Botany -- North America.
(3)
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