The Dorothy Elve Tombaugh Collection spans the years 1970-1999, with the bulk of the material dating from 1970 to 1984. The collection relates mainly to Tombaugh’s work developing, writing, and lecturing on techniques and equipment adaptations for disabled students in the mainstream high school science classroom. Primarily focused on making science education accessible to blind students, some of Tombaugh’s work was also tailored for students with mobility and hearing impairments. The collection includes correspondence, grant proposals, reports, agendas, itineraries, manuscripts, and printed matter. Tombaugh’s color presentation slides used during her lecture are also included, as well as a talking blood pressure monitor, a Braille label maker, and a set of hand-held tools used in the creation of Braille text and tactile graphics. The majority of materials in the collection pertain to the acquisition, logistics, and reporting of Tombaugh’s U.S. lecture tours (1979-1981), which were funded by the National Science Foundation. On these tours Tombaugh traveled by van and gave talks, workshops, and consultations to teachers and blindness professionals at high schools, universities, schools for the blind, and organizations for the blind. Her husband, Roy, a retired engineer, traveled with her and assisted with A/V equipment and logistics. He also contributed to or co-authored some of her writings and built models of accessible laboratory equipment and furniture.