The literature covered in this review includes recent developments which became available since the review by Roe (221) and continues through the literature reported in Chemical Abstracts through November 20,1967.Potentiometric titrations and potentiometry were reviewed by Banick (15), Gross and Murray (88), and Hilton (105). Acid-base titrations and pH measurements were reviewed by Bates (16), Hahn (91), and Wimer (281). Redox titrations were reviewed by Strickman (256) and Headridge, Pierce, and Anderson (96). Electrode sign conventions were briefly treated by Van Rysselberghe et al. (269).