The last few pages of the four page booklet, tell of more interesting ways to hide and discover secret writing on counterfeit stamps, photography, and vanishing ink.
A small four page booklet, entitled Invisible Photography and Writing, Sympathetic Ink, appears to be the result of testing, by the chemist at the U.S. Bureau of Standards. The information, was produced by a hand writing expert, out of San Francisco, CA, by the name of Theodore Kytea(?). The booklet states it's "Confidential and Not for Publication".
The CIA found the Secret German Ink intriguing and potentially useful. They sent the ink formula’s the Director of the Bureau of Standards, to see if they could recreate the mixtures and to also see how they worked.
Several years ago, the CIA declassified six of the oldest classified documents remaining from 1917-1918, in regards to Secret Ink. One document outlines the chemicals and techniques for the development of certain types of secret ink and a method for opening sealed letters without detection.
A little known part of the Signal Corps history, is that was the first home of The National Weather Service, as mandated by congress in 1870.
The Signal Corps History of the U.S. Army has special meaning for me, because my grandfather, Samuel Howard Hindman, was a member of the U.S. Army Signal Corps during World War One.
Last week, I had the pleasure to view the National World War One Museum, Honoring our History Tour , presented by Waddell & Reed, (The investment advisers). The two men, founded their company in 1937 and were former veteran's of WWI.
The Battle of Heligoland Bight in 1914, was the first Naval Battle of WW I, between Britain & Germany. It would not be the last.
Frank Buckles, last known U.S. Doughboy of WWI, dead at age 110. Not only did he serve in WWI, but during WWII, he became a Japanese Prisoner of War.
The summer of 1919, saw Jimmy Doolittle transferred to the 90th Aero Squadron in Texas. The job-Patrol the U.S.-Mexico Border, to prevent Mexican intruders and smugglers from entering the U.S.