Engraving of a Lost Mathew Brady Ambrotype Photo of American Arctic Explorer Elisha Kent Kane With Expedition Members After Returning From the Second Grinnell Expedition (1855)

 

Engraving of a lost Mathew Brady ambrotype of Arctic explorer Elisha Kent Kane (center) with fellow expedition members after returning to New York City after the Second Grinnell Expedition in October 1855. Originally published on the cover of Frank Leslie's Illustrated Newspaper in December 1855.

Original caption: "The Arctic Explorers. Drawn by Wallin. From an Ambrotype by Brady."

Source: Archive.org.

A retouched second or third generation copy of the original photo.

Daguerreotype With Multiple Exposures of the Moon Taken With a Telescope Probably by French Photographer Antoine-François-Jean Claudet (1840's/1850's)

Daguerreotype with at least 18 exposures of the moon taken with a telescope probably by French photographer Antoine-François-Jean Claudet, c. 1846-1852. British photographer John Jabez Edwin Mayall is also credited with taking the daguerreotype.

Source: Metropolitan Museum of Art.

Two American Soldiers Keeping Watch From the Ruins of an Observatory in Montfaucon, France (1918)

Two American soldiers keeping watch from the ruins of an observatory in Montfaucon, France, October 17, 1918.

Source.

Union Zouaves of the 4th Michigan Volunteer Infantry Regiment Posing as if Fighting in Combat During the Civil War

"Picket Guard on the alert." A group of Union Zouaves from the 4th Michigan Volunteer Infantry Regiment posing as if fighting in combat during the Civil War. Animated stereoview.

Source.
More information.

A sharper version of one half of the stereoview. Source.

Russian Officers Watching a Japanese Assault on a Russian Fort During the Siege of Port Arthur

Russian officers watching a Japanese assault on a Russian fort during the Siege of Port Arthur, 1904.

Source.