The diagnosis and treatment of Bright's disease depends, in part, on the understanding the physician has of the renal lesion with which he is dealing. As clinical practitioner,1 he would prefer to formulate a picture of the disease without bothering with numerical values and calculations. A knowledge of the rate at which formed elements are passed in the urine, together with the quantitative estimation of the rate of elimination of protein, greatly increases the value of the urinalysis. The Addis method2 of collection of urine and enumeration of the formed elements of the urine and estimation of urine protein provides the necessary information, but is of little value to the clinical practitioner, because it is time-consuming and does not provide constantly uniform conditions which enable him to tell at a glance the nature of the renal lesion. Constantly uniform conditions can be obtained in the modified method described