These are by no means of the caliber of what has been posted here lately, but I think they are still interesting. Hope you enjoy seeing them.
The following are glass slides that were sent to a movie theater in Green Bay, WI in 1917 to show between films giving current news and events. One slide caption states "Lieut. Franklin K. Lane Jr., Son of Secretary Lane of the Interior, in his Navy Aeroplane. He has just resigned from a commission in the English Army to serve under his own Colors". "Shown through courtesy of Joannes Bros. Company - Home of Martha Washington Pure Food Products". This glass slide was produced by the Western Newspaper Union of New York. The slide measures 3-1/4" x 4".
The other slide reads "A Seismograph with delicate disk attachment used by the clever Frenchmen to detect aero-planes. This little machine will detect an enemy plane fifty miles away". "Shown through courtesy of Joannes Bros. Company - Home of Martha Washington Pure Food Products".