Frischkorn and Rucker (1939)
	Frischkorn and Rucker (1939) measured red blood cell counts in addition to weight in 400 infants.  The cord was not tied until pulsations ceased in 59 cases,  Frischkorn and Rucker described use of sodium amytal scopolamine analgesia analgesia and ether anesthesia in all cases.  They noted with interest that the cord continued to pulsate longer than in Budin's cases, which pre-dated use of anesthesia.  In one of Frischkorn and Rucker's cases, pulsations continued for 50 minutes.
		Blood counts were make within 24 to 36 hours of birth, with a range of 3.28 to 7.12 million red blood cells.  The average red cell count in the 59 infants whose cords were not tied until after pulsations ceased was 5,783,400, as opposed to the average for 333 cases in which the cord was still pulsating when tied was 5,198,919;  the difference was 584,481.