Eckardt posters & prints

Portrait of Johann Ludwig von Eckardt, 1794 Anonymous

Transitional ship, 1886 Unknown

Centrifuge, 1882 Anonymous

Distillation, 1882 Anonymous

Communicating by speaking tube, 1882 Unknown

Spectroscope, 1882 Unknown

Portrait of Horatio Walpole, 4th Earl of Oxford, 1754 John Giles Eckhardt

Portrait photographer's studio, c1880 Unknown

Bell telephone, 1882 Alexander Graham Bell

Carbon microphone, 1882 Unknown