As to the senile heart, it is generally assumed that the old should do no more than they are inclined to do and perhaps even lead a vegetable existence. But he believes that disinclination to movement means and makes under-oxidization and causes decay and he is severe on what he calls senile laziness. The healthier and happier old people are, the more active they become. The life of a hothouse plant is bad. Humphry found in most old people he examined little or no change in the arterial system. Allbutt says there are many old people in whom there is no arteriosclerosis. One common phenomenon of old age is the loss of vascular tone and defective lymph circulation. The bones lose weight and size and the walls of the shaft grow thin from within, especially toward the end of the bones and most near the head of the femur. Trunecek of Prague emitted the thesis that certain salts can be introduced into the blood current that aid in dissolving the calcium phosphate found in the structure of sclerosed arteries. So he injected hypodermically a strong solution of sodium phosphate and magnesium phosphate, which are normally found in the blood serum but only in minute quantities. Others have introduced this by both bowel and mouth. Anything that aids oxidation of tissues helps. In another article[161] Taylor says almost nothing that is new although there is much that would be practical to aging people. The machinery has become a little worn and weaker in spots but the bare surfaces have been abraded to meet each other so that there is less friction and racking of the joints. The body cells are less irritable. Degenerative diseases are very insidious. They increase in the following order--liver, digestion, apoplexy, nerves, heart, kidneys. One’s enjoyment of food is greater perhaps than discriminative. Many reminders of age are overcome by warming up. Skin emanations may be offensive. Traits of a mature mind are poise, deliberation, economy and the largest output of judgment, like the Roman senators or seniors. Irritability is common. Youth wants to know; age wants to be. * * * * *