"There can be little doubt that the state of immunity which one attack of certain fevers confers against future attacks depends partly upon what is called the phagocytic action of leucocytes. These have been actually observed to draw into their interior and destroy bacilli which would otherwise have multiplied and produced their special effects. There can be little doubt, either, that we are continually taking into our systems bacilli of all sorts, and that, again, disease is averted by the activity of the germ-devouring leucocytes. Dr. Broadbent describes an experiment which proves that power of resisting disease is largely dependent on the activity of these cells. A rabbit, having had a certain quantity of bacilli injected under its skin, suffers from inflammation at the spot, and perhaps abscess, but recovers. At the same time, another rabbit is treated in precisely the same way, but, simultaneously, a dose of chloral is injected into another part of the body. The chloral, circulating in the blood, is known to paralyze leucocytes, and, as a result of this, they do not collect and wage war on the bacilli injected under the skin; there is very little local reaction, the bacilli get free course into the lymph and blood, and the animal dies. But, in the words of Dr. Broadbent, 'alcohol in excess has a similar action on the leucocytes, and this, as well as the deteriorating influence of chronic alcoholism on the tissues, predisposes to septic infection. A single debauch, therefore, may open the door to fever or erysipelas.' A similar experiment of Doyen confirms this. He found that guinea pigs can be killed by the cholera microbe, when introduced by the mouth, if a dose of alcohol has been previously administered. It has been the general testimony of observers in cholera epidemics that those addicted to much alcohol are far more liable to fatal attacks. But while large doses of alcohol are, of course, more obviously injurious, it would be absurd to imagine that lesser quantities are entirely without influence in the same direction. It has, indeed, been shown by Dr. Ridge, that even infinitesimal quantities of alcohol, such as one part in 5,000, cause a more rapid multiplication of the _bacillus subtilis_ and other bacilli of decomposition, while, by the same quantities, the growth of both animal and vegetable protoplasm is retarded. Hence there can be no longer any question that alcohol renders the body more liable to conquest by invading microbes, less able to resist and destroy them. Alcohol, a toxine injurious to living cells, is destroyed or removed from the body as fast as nature can effect it, but while it remains, and while able to affect the cells at all, its action is detrimental to healthy growth and healthy