Procedures for the determination of sulphur in insoluble sulphates, for the determination of copper in copper ores by iodometric methods, for the determination of iron by permanganate in hydrochloric acid solutions, and for the standardization of potassium permanganate solutions using sodium oxalate as a standard, and of thiosulphate solutions using copper as a standard, have been added. The determination of silica in silicates decomposable by acids, as a separate procedure, has been omitted. The explanatory notes have been rearranged to bring them into closer association with the procedures to which they relate. The number of problems has been considerably increased. The author wishes to renew his expressions of appreciation of the kindly reception accorded the earlier editions of this manual. He has received helpful suggestions from so many of his colleagues within the Institute, and friends elsewhere, that his sense of obligation must be expressed to them collectively. He is under special obligations to Professor L.F. Hamilton for assistance in the preparation of the present edition. HENRY P. TALBOT !Massachusetts Institute of Technology, September, 1921!. CONTENTS PART I. INTRODUCTION SUBDIVISIONS OF ANALYTICAL CHEMISTRY GENERAL DIRECTIONS Accuracy and Economy of Time; Notebooks; Reagents; Wash-bottles; Transfer of Liquids PART II. VOLUMETRIC ANALYSIS GENERAL DISCUSSION Subdivisions; The Analytical Balance; Weights; Burettes; Calibration of Measuring Devices GENERAL DIRECTIONS Standard and Normal Solutions !I. Neutralization Methods! ALKALIMETRY AND ACIDIMETRY Preparation and Standardization of Solutions; Indicators STANDARDIZATION OF HYDROCHLORIC ACID DETERMINATION OF TOTAL ALKALINE STRENGTH OF SODA ASH DETERMINATION OF ACID STRENGTH OF OXALIC ACID !II. Oxidation Processes! GENERAL DISCUSSION BICHROMATE PROCESS FOR THE DETERMINATION OF IRON DETERMINATION OF IRON IN LIMONITE BY THE BICHROMATE PROCESS DETERMINATION OF CHROMIUM IN CHROME IRON ORE PERMANGANATE PROCESS FOR THE DETERMINATION OF IRON DETERMINATION OF IRON IN LIMONITE BY THE PERMANGANATE PROCESS DETERMINATION OF IRON IN LIMONITE BY THE ZIMMERMANN-REINHARDT PROCESS DETERMINATION OF THE OXIDIZING POWER OF PYROLUSITE IODIMETRY DETERMINATION OF COPPER IN ORES DETERMINATION OF ANTIMONY IN STIBNITE CHLORIMETRY DETERMINATION OF AVAILABLE CHLORINE IN BLEACHING POWDER !III. Precipitation Methods! DETERMINATION OF SILVER BY THE THIOCYANATE PROCESS PART III. GRAVIMETRIC ANALYSIS