Preface

This is the third volume of the collective index of the Transactions Each volume is indexed and the indices of Volumes I to XXXV have been collected into a single index volume, similarly the indices of Volumes XXXVI to LV are collected in a single volume This index covers Vol¬umes LVI to LXXII, and the three index volumes together cover all the volumes of Transactions published from the organization of the American Institute of Mining and Metallurgical Engineers in 1871 until the end of 1925.