In 1969, the Committee on Standardization of Combustion Instability Measurements in the T-Burner, an ad hoc committee organized by the ICRPG Working Group on Solid Propellant Combustion, produced the 'T-Burner Manual' (C.P.I.A. Publication No. 191). That report was restricted to experience gained in testing propellants not containing a metal. During the last few years, considerable use has been made of the T-burner for testing metallized propellants. It is the first purpose of this report to summarize much of that work, and to recommend as far as possible standard procedures.