"Determination of the Atomic Weight of Cadmium and the Preparation of Certain of Its Sub-Compounds" by Harry C. Jones is a scientific publication written in the late 19th century. This dissertation was presented to the Board of University Studies of the Johns Hopkins University for a Doctor of Philosophy degree and focuses on the chemical processes and methodologies for determining the atomic weight of cadmium as well as the preparation of specific cadmium sub-compounds. The book delves deeply into the historical context and previous research regarding cadmium's atomic weight, noting various discrepancies and methodological challenges faced by earlier scientists. It also details Jones's own experimental techniques, including the purification of cadmium, measurement methods, and the successful synthesis of cadmium oxalate, hydroxide, and halide compounds. The systematic approach taken in the experiments leads to refined values for cadmium's atomic weight, contributing to ongoing discussions and developments in the field of chemistry during that period. Overall, it serves as both a record of experimental findings and a reflection on the scientific methods used in the study of chemical elements at the time. (This is an automatically generated summary.)