The Emerald, Vol. 1, No. 1, July 15, 1911 The Sigma Pi Emerald, Vol. 2, No. 1, October 1, 1914 The Sigma Pi Emerald, Vol. 2, No. 2, January 1915 The Sigma Pi Emerald, Vol. 2, No. 3, May 1915 The Sigma Pi Emerald, Vol. 3, No. 1, January 1916 The Sigma Pi Emerald, Vol. 4, No. 2, July 1917 The Sigma Pi Emerald, Vol. 4, No. 3, October 1917 The Sigma Pi Emerald, Vol. 4, No. 4, January 1918 The Sigma Pi Emerald, Vol. 5, No. 1, April 1918 The Sigma Pi Emerald, Vol. 5, No. 2, July 1918 The Sigma Pi Emerald, Vol. 5, No. 3, October 1918 The Sigma Pi Emerald, Vol. 5, No. 4, January 1919 The Sigma Pi Emerald, Vol. 6, No. 1, April 1919 The Sigma Pi Emerald, Vol. 6, No. 2, July 1919 The Sigma Pi Emerald, Vol. 6, No. 3, October 1919 The Sigma Pi Emerald, Vol. 6, No. 4, January 1920 The Emerald of Sigma Pi, Vol. 7, No. 1, April 1920 The Emerald of Sigma Pi, Vol. 7, No. 1-A, May 1920 The Emerald of Sigma Pi, Vol. 7, No. 2, July 1920 The Emerald of Sigma Pi, Vol. 7, No. 3, October 1920