Photo by Wikipedia user AgnosticPreachersKid.The Volta Laboratory and Bureau, founded in the 1880s by Alexander Graham Bell, has been the home of research for deaf and hard of hearing persons. The building, located on 35th and Volta Place in the Georgetown neighborhood was built in 1893 and is a National Historic Landmark. In 1879, Bell moved to D.C. with his wife Mabel Hubbard, who had been deaf from early childhood. The next year, the…