Pioneers in change

Describes the life and accomplishments of the former slave who became a scientist and devoted his career to helping the South improve its agriculture.

A biography of an outstanding creative thinker and designer whose inventive technological expressions were attempts to make life easier and more comfortable for people while still maintaining a close relationship with nature.

Describes the life and work of the biologist and conservationist, examining the role of her writing in initiating the environmental movement.

Presents a biography of the speech teacher whose study of sound and human voice led to the invention of the telephone.

A biography of the African American inventor who, among other contributions, invented an inexpensive method for manufacturing carbon filaments for electric light bulbs.