Excerpt from Structure of Martensitic Carbon Steels and Changes in Microstructure Which Occur Upon Tempering In all cases the specimens were deeply ground on a transverse section before any examination was made, so that the results Obtained would be indicative Of the condition Obtaining through out the interior Of the sample and not merely of the surface. The Size of the specimens, which had purposely been made small, in order to insure vigorous and uniform hardening through out, permitted only scleroscope hardness determinations, in addi tion to the study of the microstructure, being made. The hardness Of each specimen was determined in its hardened, but untempered, state as a check upon the efficiency and uniformity of the harden ing treatment. 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.