of yellow fever. When the Great Freeze of 1894 and 1895 ruined the citrus industry, farmers diversified by growing vegetables as well. Celery was first planted in 1896, and because of this Sanford is nicknamed the "Celery City." On December 1, 1891, merchant William Clark and registered African American voters of Goldsboro incorporated as a town just to the southwest of Sanford. In 1878, Mrs. Henry Sanford created the first library for public use in Sanford. A room was provided with a few books and a paid librarian. The initial library failed. In 1889, Mrs. Thrasher and Mrs. A.M. Deforest attempted to revive the library project with the aid of the Wednesday Club, the president, Mrs. Brown encouraged the women to begin fundraising efforts. The effort's fundraising progress was slow and sporadic. A Subscription library was established in a storefront on First Street. Mrs. Duver was the librarian at this location. The library later moved to Magnolia Avenue next to the theatre at this location the library was run by volunteers. The library grew at this location, until it moved in 1914 to the Women's Club on Oak Avenue. An official Public Library was built and opened in 1924 on 5th Street. This library was supported by the City of Sanford. 20th century In 1911, the community of Sanford Heights seceded from Sanford, because of discord over municipal services provided by Sanford. This added to concerns that Sanford's ability to expand would be constrained by the surrounding towns of Goldsboro, Georgetown and Sanford Heights, as well as Lake Monroe to the west. Florida State Representative and former Sanford mayor Forrest Lake led legislative efforts to curtail Sanford Heights' ability to incorporate as an independent entity. Goldsboro was also a target in Forrest Lake's annexation process, prompting Goldsboro's leaders to start a letter writing campaign to local newspapers. On April 6, 1911, the Sanford city council passed a resolution to annex Goldsboro and on April 26, 1911, the Florida legislature passed the Sanford Charter Bill, dissolving the incorporation of both Sanford and Goldsboro, and reorganizing Sanford as a city that included Goldsboro within its boundaries. In 1913, Sanford became the county seat of Seminole County, created from Orange County. Agriculture continued to dominate the economy until 1940, when it proved cheaper to cultivate produce in frost-free South Florida. Naval aviation In 1942, Naval Air Station Sanford was established, which conducted operational