Also on this day: The “S-O-S” distress signal is adopted at the International Radio Telegraphic Convention in Berlin.The First Battle of Ypres during World War I ends with an Allied victory against Germany. A flying boat, the China Clipper, takes off from Alameda, Calif., carrying more than 100,000 pieces of mail on the first trans-Pacific airmail flight.The Humane Society of the United States is incorporated as the National Humane Society.