In the course of his experience as an analytical chemist the writer felt the need for an up-to-date (1932), concise and yet comprehensive set of chemical factor tables purposely designed to fit the requirements of the analyst. All factors and logarithms have been derived from the 1931 International Atomic Weights and a system of checking calculations was employed which the author believed largely eliminated errors of computation. The inclusion of the correct temperatures for the drying or ignition of precipitates is a novelty that was thought justifiable on the grounds that no other source exists in which this essential data can be found in a collected form suitable for ready reference.