the collapse of the veins may be shown approximately in millimeters
of mercury by multiplying by 2 each inch above the level of the
heart in which the veins collapse. When a normal person reclines
after standing there is a fall in venous pressure, and when he again
stands erect there is an increase in venous pressure.

Bailey [Footnote: Bailey: Am. Jour Med. Sc., May, 1911, p. 709.]
states that in interpreting pulsation in the peripheral veins, it
should not be forgotten that they may overlie pulsating arteries.
Pulsation in veins may be due also to an aneurysmal dilatation, or
to direct connection with an artery. As the etiology in many
instances of varicose veins is uncertain, he thinks that they may be
caused by incompetence of the right heart, more or less temporary
perhaps, from muscular exertion. This incompetence being frequently
repeated, peripheral veins may dilate. Moreover, the contraction of
the right heart may cause a wave in the veins of the extremities,
and he believes that incompetency of the tricuspid valve may be the
cause of varicosities in the veins of the extremities.


NORMAL BLOOD PRESSURE FOR ADULTS

Woley [Footnote: Woley, II. P.: The Normal Variation of the Systolic
Blood Pressure, THE JOURNAL A. M. A., July 9, 1910, p. 121.] after
studying, the blood pressure in a thousand persons, found that the
systolic average for males at all ages was 127.5 mm., while that for
females at all ages was 120 mm. He found the average in persons from
15 to 30 years to be 122 systolic; from 30 to 40, 127 mm., and from
the ages of 40 to 50, to be 130 mm.