This publication, Thermal Transmission Measurements of Insulation, contains papers presented at a symposium on Heat Transmission Measurements held in Philadelphia, Pa., 19-20 Sept. 1977. The symposium was sponsored by Committee C16 on Thermal and Cryogenic Insulation Materials of the American Society for Testing and Materials. R. P. Tye, Dynatech R/D Company, presided as symposium chairman and editor of this publication.