In the routine examination of the urine of patients admitted to this hospital one is struck by the frequency of albuminuria. For example, 27·4% of 667 consecutive female admissions had a trace of albumin in the urine (i.e., a faint cloud appeared when the heat test was applied), while 37·2% had more marked albuminuria (i.e., the urine showed a thick cloud when the heat test was applied); only 35·4% were entirely free from albuminuria. Of 517 consecutive male admissions 20% had a trace of albumin in the urine, 19·5% more marked albuminuria, and 60·5% were free from albuminuria. B. H. Shaw (1) at Stafford found even higher percentages in his 250 admissions in 1935.