Several interesting American museums tell about health subjects. One is the Doctor Samuel D. Harris National Museum of Dentistry. It is at the University of Maryland in Baltimore. That is where the first college in the world to train dentists began. The museum tells about the history of the medical treatment of teeth. Visitors can see some frightening _ that once were used to remove infected   teeth. They also can see sets of teeth made of animal bone. They were made for a famous American -- the first President, George Washington. Most people do not consider a visit to the dentist their idea of a good time. However, the director of the museum says he wanted to make the museum a fun place to visit. He says he also wants to teach visitors about the importance of taking care of their teeth. Another museum collects _ that help people hear. The Kenneth W. Berger Hearing Aid Museum is at Kent State University in Kent, Ohio. The museum has more than three-thousand hearing aids from around the world. They include old and strange devices. Some hearing aids were made to look like other objects. That is because in the past many people did not want anyone to know they were wearing a hearing aid. What do we learn about George Washington from the text?
He once visited the National Museum of Dentistry. He considered the Museum of Dentistry a fun place to visit His artificial teeth were collected in the National Museum of Dentistry. His teeth seemed to be made of animal bone.