The process generally followed to determine the amount of chlorids in the urine is precise. It is, nevertheless, complicated and time-consuming, even for the operator in the clinical laboratory. In addition, requiring the use of a buret, volumetric flask, volumetric pipets, filters and porcelain dishes, it demands a quantity of calibrated apparatus, which makes the method almost inaccessible to the general practitioner. The need of a simpler procedure, by which the usefulness of chlorid estimations might be made general, was recognized in Europe some years ago. Achard and Thomas,1 in France, and H. Strauss,2 in Germany, have introduced short methods comparable to the technic of albumin determinations by the Esbach tube, which in their opinion greatly facilitate chlorid estimations without sacrificing the degree of accuracy necessary for the diagnostic value of these analyses. Little use, however, seems to have been made of their work, and no