The Chemistry Of Pottery by Karl Langenbeck. Most of the technical publications on pottery, in book form, dwell on the mechanical technology of the clay industries, the chemical parts consisting merely of receipts, claiming a practical origin. While to many of our chemists, engaged in developing the natural resources of the country the clays found on every side have seemed to offer a fruitful field for investigation, the information at command concerning the chemical needs of the potter has been so meagre, that their efforts have been practically abortive. The thousands of analyses published are mostly worthless, because they do not go far enough or because unaccompanied by essential physical tests and practical trials. It is hoped that this little treatise will supply information that will turn future labours in this channel to good account.