Foote conducted a simple experiment. She put a thermometer in each of two glass cylinders, pumped carbon dioxide gas into one and air into the other and set the cylinders in the Sun. The cylinder containing carbon dioxide got much hotter than the one with air, and Foote realized that carbon dioxide would strongly absorb heat in the atmosphere.

An amateur scientist, Foote conducted a series of experiments that demonstrated the interactions of sunlight on different gases. [59] She used an air pump, two glass cylinders, and four mercury-in-glass thermometers. In each cylinder, she placed two thermometers and then used the pump to evacuate the air from one cylinder and compress it in the other cylinder. [61] [62] When both cylinders reached equal ambient temperatures, they were placed in the sunlight and temperature variances were measured. [61] [63] She also placed the containers in the shade for comparison and tested the temperature results by dehydrating one cylinder and adding water to the other, to measure the effect of dry versus moist air. [6] [33] Foote noted that the amount of moisture in the air impacted the temperature results. [18] [61] [63] She performed this experiment on air, carbon dioxide (CO 2) (which was called carbonic acid gas in her era), and hydrogen, finding that the tube filled with carbon dioxide became hotter than the others when exposed to sunlight. [64] She wrote: "The receiver containing this gas became itself much heated—very sensibly more so than the other—and on being removed [from the Sun], it was many times as long in cooling". [59] Eunice Foote – "Circumstances Affecting the Heat of the Sun's Rays" (1856), American Journal of Science and Arts. Foote recognized the implications of carbon dioxide's heat-capturing properties—the greenhouse effect—for the entire planet. Foote described her findings in a paper, "Circumstances Affecting the Heat of the Sun's Rays", that she submitted for the tenth annual AAAS meeting, held on August 23, 1856, in Albany, New York. [6] [29] [67] For reasons that are unclear, [4] [68] Foote did not read her paper to those present—even the few women who became members seldom presented their work at the conference [6] [7] [Notes 5]—and her paper was instead presented by Joseph Henry of the Smithsonian Institution. [4] [68] Henry introduced Foote's paper by stating "Science was of no country and of no sex. The sphere of woman embraces not only the beautiful and the useful, but the true". [29] Yet, he discounted her findings in the New-York Daily Tribune article about the presentation, saying "although the experiments were interesting and valuable, there were [many] [difficulties] encompassing [any] attempt to interpret their significance". [6] [69] Stratton, Charles E. (1906). "Francis Benjamin Arnold". Secretary's Report of the Class of 1866 of Harvard College (June 1901 June 1906). Boston, Massachusetts: Harvard Class of 1866. 11: 11–12. OCLC 27064952. Cooke, William. Memoirs of Samuel Foote, Esq: With a Collection of His Genuine Bon-mots, Anecdotes, Opinions, &c 1805. ( Online.)In her brief study, entitled Circumstances affecting the Heat of the Sun’s Rays , the amateur scientist described an experiment in which she exposed glass cylinders equipped with thermometers to the Sun and attached to a pump to draw air from one and compress it in the other. Eunice compared the heating and cooling in the two cylinders. She observed, first, that the cylinder with the compressed air heated up more than the other in which the vacuum had been drawn. Second, that the heating was greater with moist air than with dry air. Thirdly, and this was her great and almost fortuitous discovery—since she also experimented with hydrogen and oxygen—that the greatest degree of heating occurred when one of the cylinders was filled with carbonic acid gas: CO 2 . “The receiver containing the gas became itself much heated—very sensibly more so than the other—and on being removed, it was many times as long in cooling,” she wrote The first relationship between CO 2 and the greenhouse effect

Reed, Elizabeth Wagner (1992). "Eunice Newton Foote: 1819–1888". American Women in Science before the Civil War (PDF). Minneapolis, Minnesota: University of Minnesota. pp.65–68. OCLC 28126164. Archived from the original (PDF) on July 8, 2016. Schwartz, John (April 27, 2020). "Overlooked No More: Eunice Foote, Climate Scientist Lost to History". The New York Times. New York, New York. Archived from the original on May 24, 2022 . Retrieved December 28, 2021. Kohlstedt, Sally Gregory (1976). The Formation of the American Scientific Community: The American Association for the Advancement of Science, 1848–60. Urbana, Illinois: University of Illinois Press. ISBN 978-0-252-00419-3.

What happened to Katy Armstrong on Corrie?

Hayhoe, Katharine (September 2, 2016). "John v Eunice – A Fascinating Tale of Early Climate Science, Women's Rights and Accidental Poisoning". Facebook. Texas. Archived from the original on May 20, 2018 . Retrieved July 13, 2022. A forgotten founder of climate science: Eunice Newton Foote", 40-minute BBC World podcast, September 2022 She published a second paper in 1857, on atmospheric static electricity, explaining how moisture in the air affects static electricity. Foote, Eunice (August 1857). "On a New Source of Electrical Excitation". Proceedings of the American Association for the Advancement of Science: Eleventh Meeting. Cambridge, Massachusetts: Joseph Lovering: 123–126. OCLC 923936325.