This story starts with a Gilded Age true crime: in 1898, a General Electric patent attorney is shot dead in his Schenectady home by a burglar. Weeks later his widow gives birth to a daughter, Katharine Burr Blodgett, who will not enter a classroom until age eight because her mother instead raises her bilingual across France, Germany, and New York. That unstructured, observation-rich childhood produces one of the 20th century’s most adaptable scientific minds, and this episode follows her back to the very company her father worked for, where a lab tour led by future Nobel laureate Irving Langmuir turns into a job offer with one condition attached: go get a higher degree first.

She more than complied. After studying charcoal adsorption for World War One gas masks, she became the first woman research scientist at GE’s Schenectady laboratory, then the first woman ever to earn a physics PhD from Cambridge, studying under Ernest Rutherford himself. Her masterpiece came in 1935: dipping glass through a water bath again and again, stacking exactly 44 single-molecule layers of a soap-like fat, she made glass more than 99 percent transmissive. Invisible glass, achieved by making reflected light waves cancel each other out, decades before anyone said the word nanotechnology.

• The Langmuir-Blodgett trough explained: a microscopic forest of molecules standing on water, zipped onto glass one perfect layer per dip
• Why GE never sold her flawless invention: a coating of fat too soft to survive a cleaning cloth, and the pivot that turned “failure” into a color gauge measuring films to a millionth of an inch
• War work twice over: gas mask chemistry in one world war, aircraft de-icing and optimized smoke screens in the next, en route to eight patents
• The scientist as whole person: town theater, funny poems, gardening, bridge, and the suitcases of lab apparatus she brought to dazzle a niece who grew up to be an astrophysicist