Russian-readers will be richly rewarded, given that Dobzhansky modulates entries between Russian and English. In some entries, he self-consciously reflects on the language he opts to use. For example, on February 16, 1952, he imagines his child (Sophie) as the audience of his entries: "I am switching to English, in order that my child would find it easier to accompany her father's experiences, is she wants to accompany them."
 
Even in diaries recorded predominantly in Russian, Dobzhansky encloses numerous ephemera—business cards, letters, hand-drawn sketches, recognitions/awards, medical test results, newspaper clippings, and more—accessible to English-speakers. In many of his diaries from the 1950s and 1960s, typed letters provide some insights into his thoughts on health, mortality, and faith (e.g. 2/16/1952, 5/16/1957, 7/16/1968, 10/13/1969)
 
(strained) relations with his children (e.g. 5/16/1957, 10/28/1968, 12/31/1968)
 
and career (3/25/1970
 
6/30/1970, 1/25/1975).
 
Dobzhansky traveled widely, providing particularly detailed accounts of South America and the American West. While English entries largely abstains from discussing politics, he does occasionally discuss Brazilian politics (e.g. 9/7/1954, 10/16/1955), and the election of Richard Nixon, about whom he is consistently critical (e.g. 11/6/1970, 12/31/1973, 8/8/1974).
 
Throughout his four decades of journal-writing, Dobzhansky expresses one consistent concern: his desire to continue doing useful work. Marking his final birthday, he writes, "So, I have lived ¾ of a century. Today begins the last quarter, or rather past thereof…Oh God, give me power to finish my life serving you by doing my life work in science! In 75 years I have not yet exhausted either my interest or, I hope, my ability" (1/25/1975).

The Dobzhansky Papers feature 47 volumes spanning 1934-1975. (The boxes in which they are enclosed also include other notebooks and workbooks without sequential entries.) These diaries ought to interest researchers studying genetics and evolutionary biology, early-twentieth-century travel expeditions (particularly into the Amazon), the creationist debate (especially in textbooks and public schools), the post-war university (Columbia University, in particular), South American politics, and Dobzhansky's biography.
 
Russian-readers will be richly rewarded, given that Dobzhansky modulates entries between Russian and English. In some entries, he self-consciously reflects on the language he opts to use. For example, on February 16, 1952, he imagines his child (Sophie) as the audience of his entries: "I am switching to English, in order that my child would find it easier to accompany her father's experiences, is she wants to accompany them."
 
Even in diaries recorded predominantly in Russian, Dobzhansky encloses numerous ephemera—business cards, letters, hand-drawn sketches, recognitions/awards, medical test results, newspaper clippings, and more—accessible to English-speakers. In many of his diaries from the 1950s and 1960s, typed letters provide some insights into his thoughts on health, mortality, and faith (e.g. 2/16/1952, 5/16/1957, 7/16/1968, 10/13/1969)
 
(strained) relations with his children (e.g. 5/16/1957, 10/28/1968, 12/31/1968)
 
and career (3/25/1970
 
6/30/1970, 1/25/1975).
 
Dobzhansky traveled widely, providing particularly detailed accounts of South America and the American West. While English entries largely abstains from discussing politics, he does occasionally discuss Brazilian politics (e.g. 9/7/1954, 10/16/1955), and the election of Richard Nixon, about whom he is consistently critical (e.g. 11/6/1970, 12/31/1973, 8/8/1974).
 
Throughout his four decades of journal-writing, Dobzhansky expresses one consistent concern: his desire to continue doing useful work. Marking his final birthday, he writes, "So, I have lived ¾ of a century. Today begins the last quarter, or rather past thereof…Oh God, give me power to finish my life serving you by doing my life work in science! In 75 years I have not yet exhausted either my interest or, I hope, my ability" (1/25/1975).

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.