Niels Bohr Library & Archives

Niels Bohr Library & Archives We are the Niels Bohr Library & Archives at the American Institute of Physics. We preserve and make known the history of modern physics and allied fields.

The Niels Bohr Library & Archives and the Center for History of Physics share a common mission: to help preserve and make known the history of modern physics and allied sciences.

Before modern LaTeX, there were people responsible for interpreting and typing out the special language of physics for t...
09/30/2026

Before modern LaTeX, there were people responsible for interpreting and typing out the special language of physics for the journals that published and continue to publish physics papers, an important pipeline for physics communication. India Bhalla-Ladd dove into our archives to study the unique setup of Physical Review and other AIP publications, which mostly employed women with math and science backgrounds for this specialized work, from 1962-1977. We got the chance to interview her:

An interview with India Bhalla-Ladd

"Scientific breakthroughs do not magically translate themselves into useful products and services." AIP oral history int...
09/18/2026

"Scientific breakthroughs do not magically translate themselves into useful products and services." AIP oral history interviews, along with quantitative data, were important to Jungkyu Suh's research on how firms translate scientific knowledge into technological innovation.

Earlier this year, while exploring how graduate students have used the collections of AIP’s Niels Bohr Library & Archives in theses and dissertations , I came across a particularly intriguing study that I wanted to learn more about. In his doctoral dissertation, Essays on Science and Innovation , ...

📸 NBLA has been the longtime holders of a remarkable photograph collection: photos from physicist Hertha Sponer’s person...
09/02/2026

📸 NBLA has been the longtime holders of a remarkable photograph collection: photos from physicist Hertha Sponer’s personal album from her time at University of Göttingen. AV Archivist Elizabeth Wood embarked on a project this year to rectify its place in our archives; for decades, this collection has been labeled as part the James Franck collection, and the metadata has been missing valuable information and context about many women in the album. Now, that metadata and other information is restored, resituating the photo album as a record of Hertha Sponer’s experience, not James Franck’s. Read the full story: https://www.aip.org/library/ex-libris-universum/hertha-sponer-at-gottingen

The date of this post also marks Hertha Sponer’s birthday: she was born on September 1, 1895. Happy 131st birthday! 🎈

Hertha Sponer was best known for her work in spectroscopy and her decades-long career at Duke University physics department, as well as her distinction of being one of only three women to earn Habilitation (the right to teach and hold a professorship) in physics in Germany before World War II.

September Photos of the Month

A year ago, the Niels Bohr Library & Archives launched an initiative inviting scientists to submit their digital photos ...
08/28/2026

A year ago, the Niels Bohr Library & Archives launched an initiative inviting scientists to submit their digital photos for our collections. Since then, dozens of new images have helped us document the human side of 21st-century science, including the passion, collaboration, and occasional silliness that comes with it.

This month, we’re sharing some of our favorites. Check out the blog post photos and full descriptions: https://www.aip.org/library/ex-libris-universum/theres-a-place-for-you-in-the-archives

Pictured: A van used by IceCube to transport people and supplies at the South Pole. The wheels have been replaced by Matrax tracks. Credit: Spencer Klein

August Photos of the Month The Faces of the Physical Sciences

Before she led a distinguished crystallography career, Kathleen Lonsdale was Kathleen Yardley—a young scientist in her e...
08/18/2026

Before she led a distinguished crystallography career, Kathleen Lonsdale was Kathleen Yardley—a young scientist in her early twenties already making a name for herself through meticulous research.

The AIP Niels Bohr Library & Archives recently acquired three rare offprints of papers Yardley published in 1925 and 1926 while working with Nobel Prize-winning crystallographer William Henry Bragg. Published under her name alone, the papers offer a glimpse of her growing independence as a researcher and the X-ray crystallography techniques that would define her career.

Just a few years later, Lonsdale would help settle a scientific debate by demonstrating that the benzene ring is planar. She went on to become an expert on diamond structures, lead Britain’s first university crystallography department, and, alongside Marjory Stephenson, become one of the first two women elected to the Royal Society in 1945.

Read the post by historian Dr. Melinda Baldwin:

The AIP Niels Bohr Library & Archives recently acquired three rare offprints of early papers by the crystallographer Kathleen Yardley Lonsdale (1903-71), one of the first two women inducted into the Royal Society of London. These offprints, which are separate printings of individual articles from a....

In January 1978, American Astronomical Society President Margaret Burbidge made what seemed like a routine announcement:...
08/06/2026

In January 1978, American Astronomical Society President Margaret Burbidge made what seemed like a routine announcement: the AAS would no longer hold meetings in states that had not ratified the Equal Rights Amendment (ERA). Instead, the decision sparked months of controversy, including accusations of misconduct, threats of mass resignations, and even an ultimatum involving the IRS.

When this project began, SPS intern Amelie Heying expected a small but fun dive into archival records, but it quickly became clear that the ERA boycott was one of the most dramatic episodes in the Society's history.

The archives offer a fascinating look at how questions of equity, governance, and professional responsibility shaped the scientific community in the late 1970s.

Read the full story here:

How the Women’s Rights Movement Collided with the AAS

K. Renee Horton is a physicist and engineer whose career spans materials science, physics, aerospace, and advocacy for d...
07/29/2026

K. Renee Horton is a physicist and engineer whose career spans materials science, physics, aerospace, and advocacy for disability inclusion in STEM. As a Black woman with hearing loss, she has spoken openly about the barriers disabled scientists can face—and about the importance of making space where more people can thrive.

In 2024, NBLA's intern, Kai Hostetter-Habib, conducted an oral history interview with Dr. Horton. In it, she reflects on her early childhood growing up in Louisiana, her hearing loss diagnosis, and how that impacted the trajectory of her life. She discusses her experience as a non-traditional student, going back to college after a ten-year break with three children, and the racism she dealt with in the South. She recounts how she got involved with the National Society of Black Physicists (NSBP) and her two-year tenure as NSBP president from 2016 to 2018. Dr. Horton also goes through her career progression at NASA, from material test engineer to the Space Launch Systems quality engineer to Airworthiness Deputy. She concludes by talking about her disability rights advocacy, her mentoring, the children's books she authored, and the importance of her family.

Read about Kai's experience talking to Dr. Horton: https://www.aip.org/library/the-power-of-oral-histories

📷 NASA - Public Domain, Wikimedia Commons.

Abraham Nemeth was a mathematician whose work transformed access to science and mathematics for blind students and resea...
07/22/2026

Abraham Nemeth was a mathematician whose work transformed access to science and mathematics for blind students and researchers. Best known for developing the Nemeth Braille Code for mathematics and science notation, he helped open technical fields to countless learners. Not every scientific breakthrough comes from a lab bench; some reshape who gets to enter the lab in the first place.

📷 University of Detroit

18th century astronomer John Goodricke is best known for his observations of the variable star Algol. He was the first t...
07/15/2026

18th century astronomer John Goodricke is best known for his observations of the variable star Algol. He was the first to offer a mechanism to explain why stars vary in apparent magnitude, suggesting that Algol is what is now known as an eclipsing binary.

Goodricke was also deaf. His work reminds us that disabled scientists have always been part of scientific discovery, even when the historical record ignores them.

📷 James Scouler - Original pastel in the possession of the Royal Astronomical Society London; see the Science Photo Library. Public Domain, Wikimedia Commons.

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