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The horse and the ass, for instance, if so crossed, give rise to the mule, and there is no certain evidence of offspring ever having been produced by a male and female mule. The unions of the rock-pigeon and the ring-pigeon appear to be equally barren of result. Here, then, says the physiologist, we have a means of distinguishing any two true species from any two varieties.
It also chanced that beneath this end of the sofa there stood a tank full of water in which the physiologist was conducting certain experiments upon the ova of fish, and which he kept in his drawing-room in order to insure an equable temperature.
Such is the theory that two authors W. James and Lange happened to discover almost at the same time, Lange treating it as a physiologist and W. James as a philosopher. Their theory, at first sight, appears singular, like everything which runs counter to our mental habits.
So that, in the last-named instance, a physiologist, who should cross the two species in one way, would decide that they were true species; while another, who should cross them in the reverse way, would, with equal justice, according to the rule, pronounce them to be mere races.
This does not in the least invalidate the fact that we are able to use these as ascertained landmarks." How these substances, when taken into the body, are assimilated, and how they generate force, are well known to the chemist and physiologist, who is able, in the light of well-ascertained laws, to determine whether alcohol does or does not possess a food value.
The psychologist should sympathize deeply with the anatomist and the physiologist and the student of cerebral pathology, but equally deeply with the philosopher and the metaphysician who study the implications, present although hidden, that point to the bonds between the individual and the universe.
Although pathology, therefore, as a branch of medical science, is necessarily founded on physiology, questions may nevertheless arise regarding the true character of a structure or organ, to which occasionally the pathologist may be able to return a more satisfactory and decisive reply than the physiologist these two branches of medical knowledge being thus found mutually to advance and illustrate each other.
Stop the heart a minute and out go all three of the wicks. Choke the air out of the lungs, and presently the fluid ceases to supply the other centres of flame, and all is soon stagnation, cold, and darkness. The "tripod of life" a French physiologist called these three organs. It is all clear enough which leg of the tripod is going to break down here.
Always a physiologist, even in those rare moments when he was amusing himself, it had just struck Benjulia that the cook after her outbreak of fury might be a case worth studying. But, she had got relief in crying; her brain was safe; she had ceased to interest him. He returned to the dining-room. "You look hot, sir; have a drink. Old English ale, out of the barrel." The tone was hearty.
It is time that this phantom of vulgar prejudice faded out. "Whatever you do," said a late teacher of physiology in my presence to a young doctor, "do not venture to become an experimental physiologist that is, if you wish afterward to succeed as a doctor. It is fatal to that. It is sure to ruin you with the public."
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