The camera bears a large part in the diffusion of intelligence, and the last half century in the United States has seen a great development in photography and photoengraving. The earliest experiments in photography belong almost exclusively to Europe. Morse, as we have seen, introduced the secret to America and interested his friend John W. Draper, who had a part in the perfection of the dry plate and who was one of the first, if not the first, to take a portrait by photography.英文原著 · 《The Age of Invention》
Hapgood and A. Maurice, "The Great Newspapers of the United States; the New York Newspapers," in "The Bookman", vols. XIV and XV (1902). On the typewriter, see Charles Edward Weller, "The Early History of the Typewriter" (1918). On the camera, Paul Lewis Anderson, "The Story of Photography" (1918) in "The Mentor", vol. vi, no. 19.; and on the motion picture, Colin N. Bennett, "The Handbook of Kinematography"; "The History, Theory and Practice of Motion Photography and Projection", London: "Kinematograph Weekly" (1911).英文原著 · 《The Age of Invention》
"I know that they were much interested in photography. Cyanide of potassium is used in certain processes in photography."英文原著 · 《The Silent Bullet》
Liquid Accelerator, No. 1.--This mixture was used by me in 1849, and is given as it appeared in my "System of Photography," published at the above date:英文原著 · 《American Hand Book of the Daguerreotype》