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In incompetent hands, it could turn into a nightmare. Dal took a deep breath and began running the anatomical atlas tapes through the reader, checking the critical points of Moruan anatomy. Oxygen-transfer system, circulatory system, renal filtration system at first glance, there was little resemblance to any of the "typical" oxygen-breathing mammals Dal had studied in medical school.

The character of the above circulatory changes depends on the extent of the injury to the tissue. PALPITATION. This disturbance in domestic animals seems to be purely functional. It may occur independent of any organic heart disease. A highly nervous condition, excitement, over-exertion, debility from disease and the feeding of an improper ration are the common causes.

The physical effect of the sleep instinct, comparable with the pepsin secretion in the food instinct, or with the hyperæmia of the sexual organs in the sexual instinct, is a change in the cortex by which the sensory and motor brain centers are put out of action. What kind of a change that is, is quite indifferent. It may be a chemical one but more probably it is a circulatory one.

What play and action or interaction and reaction of purely chemical and mechanical forces can throw any light on the course evolution has taken in the animal life of the globe why the camel is the camel, and the horse the horse? or in the development of the nervous system, or the circulatory system, or the digestive system, or of the eye, or of the ear?

More recently, M. Tissié, of whom we have just spoken, has shown how specific dreams are connected with affections of the digestive, respiratory, and circulatory apparatus. I will summarize what I have just been saying. When we are sleeping naturally, it is not necessary to believe, as has often been supposed, that our senses are closed to external sensations. Our senses continue to be active.

*Connection with Arteries and Veins.*—Though the heart is in communication with all parts of the circulatory system, it makes actual connection with only a few of the blood tubes. With the right auricle, the superior and the inferior venæ cavæ and the coronary veins.

For Sir John Herschel's hypothesis of an increased retention of heat at the sun's equator, due to the slightly spheroidal or bulging form of its outer atmospheric envelope, assuredly gives no sufficient account of such circulatory movements as he supposed to exist.

The next piece of mechanism for us to consider in this machine is the device for distributing this fuel to the various parts of the machine where it is to be used as a source of energy, corresponding in a sense to the fireman of a locomotive. This mechanism we call the circulatory system.

Such hypodermic stimulation acts quickly, and may be repeated every half hour for several times, if the patient does not respond. The solution should be injected slowly, and as a rule intramuscularly. Many times while other measures are being used to repair a broken compensation, camphor makes a splendid circulatory and nervous bracer.

Pursuing the same line of study, we turn for a moment to the relation of the circulatory system to the function of supplying the body with oxygen gas. Oxygen is absolutely needed to carry on the functions of life; for these, like those of the engine, are based upon the oxidation of the fuel. The oxygen is derived from the air in the simplest manner.