Theodore eckardt posters & prints

Transitional ship, 1886 Unknown

Communicating by speaking tube, 1882 Unknown

Centrifuge, 1882 Anonymous

Distillation, 1882 Anonymous

Portrait of Johann Ludwig von Eckardt, 1794 Anonymous

Spectroscope, 1882 Unknown

Bell telephone, 1882 Alexander Graham Bell

Portrait photographer's studio, c1880 Unknown

Carbon microphone, 1882 Unknown

Violinist, 1621 Edouard Eckman