"Illustration showing the detail of a carbon arc lamp; S, solenoid; c, clutch; w, clutch-washer; T, electromagnet; m, short circuit point; R, resistance properly adjusted." -Avery 1895

Detailed Arc Lamp

"Illustration showing the detail of a carbon arc lamp; S, solenoid; c, clutch; w, clutch-washer; T,…

A portion of detail from a photograph of the Great Pyramid in Egypt.

Detail of the Great Pyramid

A portion of detail from a photograph of the Great Pyramid in Egypt.

Detail from a larger engraving of the siege of Boulogne in 1544 during the campaigns of Henry VIII in France. The detail has a banner in the upper left corner that reads "Highe Bovilloigne" and another that labels one encampment, "The Duke of Al Berkinnys Campe". The detail is from the center of the larger image. Boulogne is at the top of the illustration and their are plumes of smoke and evidence of explosions. The Basilica of Notre-Dame de Boulogneis damaged. Canons are set up as trenches are dug outside the city. There are archers and men with rifles attacking. Several soldiers with spears breach one area of the city. A man is being hung. In the foreground, troops on horseback with spears and flags cluster near an encampment of tents.

Siege of Boulogne by King Henry VIII, Detail of Cowdray Engraving

Detail from a larger engraving of the siege of Boulogne in 1544 during the campaigns of Henry VIII in…