Excerpt from Estimates of Thermal Conductivity for Unconditioned and Conditioned Materials Used in Fire Fighters' Protective Clothing This study builds upon the work performed by Lawson and Pinder They give estimates for the thermal conductivity of 10 different materials used in the construction of fire fighters' protective clothing. All measurements taken by Lawson and Pinder were on new or unused material as delivered by the manufacturer. In this study, four of the materials used by Lawson and Pinder and six additional materials are investigated. Estimates of thermal conductivity for the six additional materials were determined. Then the six new materials and the four materials from Lawson and Pinder were conditioned by undergoing a process of five washings and dryings by a contract cleaner that specializes in cleaning, decontaminating and repair of fire fighters' protective clothing. Many of the test methods used for the certification of fire fighters' protective clothing by The National Fire Protection Association (nfpa) 1971 Standard on Protective Ensemble for Structural Fire Fighting 4] require that the material pass the test method when new and after undergoing the conditioning process of five washings and dryings. Thermal conductivity of a material relates to the rate of heat transfer through the material. Heat transfer by this mechanism is based on the transfer of energy of motion between adjacent molecules. This property will vary with the amount of heat energy that a material is exposed to and is therefore moderately temperature dependent. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.