Infants frequently do not pass urine for many hours after birth, sometimes not for days. This may be due to complete want of secretion or to some temporary engorgement of the kidneys, which can be relieved by drawing the blood to the surface by immersion in a warm bath - a procedure to be adopted in all cases in which no urine is voided during the first twenty-four hours of life. Often, in lieu of the bath, it will suffice to lay a piece of flannel, wrung out of hot water, upon the lower third of the abdomen, the region over the bladder. Occasionally some physical malformation leads to retention of urine, and it is the duty of the nurse to be on the lookout, so that she may early call the physician's attention to the matter. The same condition may also prevail in the bowel, and when twelve hours elapse without any evacuation the parts ought to be carefully examined.