It was found in a former study1 that the values of the blood clotting elements in the new-born indicate that every factor is in favor of increased coagulability under normal conditions. Other influences must be considered to cause a change in these various components if spontaneous hemorrhage results. It was, therefore, considered advisable to test the results of various influences on these factors.
Ten new-born infants were exposed to ultraviolet radiation by means of an aircooled mercury vapor quartz lamp of 110 volts, 60 cycles and 10 amperes. A voltage of 70 was always administered and maintained throughout the exposure. The dorsal and ventral surfaces were exposed for two minutes each daily, and the time increased one minute a day until the length of the exposure was eight minutes.Next, ten new-born infants were given 3 drops of viosterol in oil 250 D on the second day, and