Bache's diary provides curt but consistent accounts of the Union's military operations, particularly along the Mississippi River. Those include the Battle of Charlotte (4/25), the Battle of Baton Rouge (5/28), and the Battle of Vicksburg (6/28). Notably, Bache travels to shore on at least one occasion, furnishing first-hand accounts of the Confederate South. For example, he attends a religious service, writing, "Some of the officers went to church where they prayed for the President of the Confed. States" (5/13). Later, he describes as Natchez as a "very pretty place" (5/18). Interested researchers might consider pairing this volume with the Thomas Hewson Bache Diary, also from 1862, which provides a surgeon's perspective on the Battle of Baton Rouge.

The Alexander Dallas Bache diary offers an unusual view of Civil War battlefields from the perspective of the superintendent of the United States Coast Survey. Bache served as Captain's Clerk aboard USS Harford flagship, one of 17 Union ships that traveled up the Mississippi River to take New Orleans. With entries spanning the spring and summer of 1862 (4/14-7/13), this volume recounts naval bombardments in the early years of the war, provides textured accounts of the Confederate South, and will no doubt interest researchers who study the Civil War, U.S. military history, and the Confederate States of America.
 
Bache's diary provides curt but consistent accounts of the Union's military operations, particularly along the Mississippi River. Those include the Battle of Charlotte (4/25), the Battle of Baton Rouge (5/28), and the Battle of Vicksburg (6/28). Notably, Bache travels to shore on at least one occasion, furnishing first-hand accounts of the Confederate South. For example, he attends a religious service, writing, "Some of the officers went to church where they prayed for the President of the Confed. States" (5/13). Later, he describes as Natchez as a "very pretty place" (5/18). Interested researchers might consider pairing this volume with the Thomas Hewson Bache Diary, also from 1862, which provides a surgeon's perspective on the Battle of Baton Rouge.

The Expedition Journals feature three travel journals bound in a single volume. The first two document William Dunbar's expedition up the Red and Ouachita Rivers to the Hot Springs of Arkansas in 1804-1805. Although few contemporary locations are named, they include numerous coordinates that researchers may use to track the journey. "Journal... to the Mouth of the Red River" furnishes particularly lush descriptions of the settlers (e.g. 10/21/1804) and indigenous peoples (11/24/1804) in the region. The second journal records technical data from the expedition, including a thermometrical log. Both journals dovetail nicely with that of traveling companion, George Hunter, also available at the APS (Mss.B.H912).; The final journal recounts an expedition to explore the geography of the Mississippi River led by Lt. Zebulon Montgomery Pike between 1805-1806. The Pike journal provides a daily account of the activities of the expedition during an early exploration into present day Minnesota. Notably, that journal includes significant attention to exchanges between settlers and local indigenous tribes (e.g. 9/3/1805, 9/10/1805, 9/24-25/1805). That volume has been printed with variations and omissions in An Account of Expeditions to the Sources of the Mississippi and through the Western Parts of Louisiana... (Philadelphia, 1810), and it was edited in Donald Jackson, ed., The Journals of Zebulon Pike: with Letters and Related Documents (Norman, Okla., 1966). Bound together, the Dunbar and Pike volumes ought to interest a range of scholars researching U.S. exploration and Native America in the early national period.
 

Interested researchers would do well to consult the detailed description of Hunter's four volumes available in the Early American History Note. For the purposes of diary researchers, the first volume (1796) warrants attention for its descriptions of indigenous peoples and early settlements. For example, Hunter offers an extended account of St. Louis (9/4/1796). He also describes an Indian woman whose nose was cut off by her husband for infidelity, a passage excerpted in Selected Quotations (9/9/1796). The 1802 journal documents Hunter's trip across Pennsylvania (Berlin, Carlisle, and Shippensburg), visit to a cave in Kentucky, and discussion of salt production at Blue Lick. Finally, the last two journals (1804, 1809) include various travels in the South, including a description of expedition to the Hot Springs of Arkansas (1804-1805) as well as longitudes and latitudes that researchers might use to trace Hunter's journey. Notably, Hunter discovers Mammoth bones, which he compares to those of Charles Wilson Peale, writing, "I cannot for bear mentioning a great natural curiosity I have just seen here [sic] about 2 ½ Tons of Bones of one or two Mammoths twice as large as Peals" (5/27/1804).

George Hunter maintained four journals during expeditions into Kentucky, Illinois, Mississippi, and Louisiana between 1796-1809. Hunter records his daily affairs, observations of territories, visits to trading centers, and commentary on international rivalries and relations with various indigenous peoples, including the Delaware, Cherokee, Chickasaw, Choctaw, and Osage. With rich, narrative accounts of western travel in the early national period—including exploration of Louisiana shortly after the Louisiana Purchase—the Hunter diaries ought to interest scholars researching the American west, Native America, and U.S. empire.
 
Interested researchers would do well to consult the detailed description of Hunter's four volumes available in the Early American History Note. For the purposes of diary researchers, the first volume (1796) warrants attention for its descriptions of indigenous peoples and early settlements. For example, Hunter offers an extended account of St. Louis (9/4/1796). He also describes an Indian woman whose nose was cut off by her husband for infidelity, a passage excerpted in Selected Quotations (9/9/1796). The 1802 journal documents Hunter's trip across Pennsylvania (Berlin, Carlisle, and Shippensburg), visit to a cave in Kentucky, and discussion of salt production at Blue Lick. Finally, the last two journals (1804, 1809) include various travels in the South, including a description of expedition to the Hot Springs of Arkansas (1804-1805) as well as longitudes and latitudes that researchers might use to trace Hunter's journey. Notably, Hunter discovers Mammoth bones, which he compares to those of Charles Wilson Peale, writing, "I cannot for bear mentioning a great natural curiosity I have just seen here [sic] about 2 ½ Tons of Bones of one or two Mammoths twice as large as Peals" (5/27/1804).

The meteorological observations contain at least 30 volumes spanning 1748-1822. Maintained by William Adair, Peter Legaux, James Madison, Phineas Pemberton, and other prominent figures from the early national period, these volumes capture meteorological data, thermometer readings, winds, and occasionally longitudes, latitudes, graphs, and miscellaneous notes. Phineas Pemberton recorded approximately half of the volumes, in or around Philadelphia during colonial and revolutionary period (August 1748-December 1776). Other volumes record meteorological data from New England (Samuel Williams), Natchez (William Dunbar), and Peru and northern Chile (Samuel Curson). Scholars researching late-eighteenth and early-nineteenth weather conditions will be well-served by this collection.
 

The John Slater Papers include abstracts from his diaries, available as loose, mostly typed pages, which traverse his consequential career in physics (1900-1975). These abstracts trace Slater's doctoral study at Harvard (1923) and postgraduate work at Cambridge University, appointment at MIT (1930), work at the Laboratory for Nuclear Science during World War II, and late-career at the University of Florida (after his retirement from MIT in 1966). His diaries contain notes about a trip to Japan (including Hiroshima and Nagasaki) in the fall 1953, meetings with defense contractors (such as Lockheed Martin) throughout the 1950s and 1960s, a sighting of Sputnik (7/20/1958), notes about an "NSF proposal for computing center" (4/30/1965), associations with and publications of APS members (7/7/1951, 7/7/1972), and Slater's own personal affairs, as excerpted in Selected Quotations. As such, these abstracts may interest scholars researching John Clark Slater's career in the field of physics, biochemistry, atomic history, and the history of science more broadly, as well as those considering World War II and military contractors in the Cold War period, the space race, the history of computing, and the institutional history of the American Philosophical Society.; To supplement these diary abstracts, researchers might choose to expand their exploration of the Slater Papers, which also contain 133 research notebooks (1944-1976), a lengthy series of folders, containing lectures, scientific notes, drafts of manuscripts and papers, correspondence from his collaboration with the Los Alamos Labs (1966-1970), and correspondence relating to the National Academy of Science.