The laboratory of hygiene proved so useful that in 1891 it was moved to Washington, DC, and its name gradually converted into the proper noun Hygienic Laboratory. In 1894, Kinyoun traveled to Europe to learn how to make diphtheria antitoxin. He wrote back excitedly that his associates should acquire a horse and stables to launch production. After diphtheria antitoxin, the Laboratory began to prepare vaccines against rabies and smallpox, and it experimented with improvements to them. Local and state authorities were also instructed in the manufacturing procedures.