The Philosophical Society of Texas (Dallas, November 7, 1946)
University of Texas (1950)
Nixon Reunion (Luling, Texas, November 18, 1956)
Summerfield G. Roberts Award (Houston, April 6, 1957)
Tax Payers League (May 24, 1938)
Phi Beta Kappa Meeting (December 4, 1942)
Urban Redevelopment Committee (July 18, 1950)
"Something About Books," Torch Club (November 8, 1954)
"Surgery is Not All New," San Antonio Surgical Society (May 18, 1954)
Women's Auxiliary (March 31, 1964)
"Foundation Builders," Bexar County Medical Society, n.d.
Contains reviews by Nixon of:
"Sun in Their Eyes" by Monte Barrett (Indianapolis: Bobbs-Merrill, 1944) [manuscript]
"Anson Jones: the Last President of Texas" by Herbert Gambrell (Garden City: Doubleday & Company, 1948) [manuscript]
"G.P. Reagan, Country Doctor" by Rocky Reagan (San Antonio: Naylor Company, 1963) [manuscript]
"The Rudolph Matas History of Medicine in Louisiana" edited by John Duffy (Baton Rouge: Louisiana State University Press, 1962). As appeared in the "Journal of Southern History" vol. 28, no. 4.
"Christmas Day a Hundred Years Ago" (Christmas 1946)
"La Bahia Mission" (Christmas 1947)
"Be Still, and Know that I am God" (Christmas greeting, n.d.)
Vol. 18, no. 3 (December 1956)
Vol. 23, no. 5 (May 1961)
"Bridge Builders" (La Vernia High School, May 6, 1942)
"Christian Attitudes and Christian Adjustments in the Postwar World" (Fannie Andrews Nixon Class, Luling, Texas, November 2, 1944)