In the 1930s Dr Gertrude Blanch led the important Mathematical Tables Project, a nearly 450-person effort to compute logarithmic, exponential, and other calculation results essential to the American government, military, finance, and science. After earning her doctorate in mathematics at Cornell, she led new approaches to computation and published volumes of tables and calculations in scientific journals. Despite her contributions, Blanch did not appear as the author of the papers she wrote. For the majority of her time on the project, her male supervisor Arnold Lowan instead received credit. This is a lasting