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Updated: June 20, 2025
He was thus answering Auguste Comte, who, in a moment of aberration, claimed that psychology, in order to become a science, ought to reject the testimony of the consciousness, and to use exclusively as its means of study the histology of the nerve centres and the measurement of the cranium.
There was practically no histology taught, and little or no pathology. Almost every bit of the microscope which I did was learned on my own instrument at home. Anatomy, however, we were well taught in the dissecting-room, where we could easily obtain all the work we needed.
Another peculiarity I have found in the physiology which has been current, and that is, that in the minds of a great many gentlemen it has been supplanted by histology. They have learnt a great deal of histology, and they have fancied that histology and physiology are the same things.
The histology of ainhum shows it to be a direct ingrowth of epithelium, with a corresponding depression of surface due to a rapid hyperplasia that pushes down and strangles the papillae, thus cutting off the blood supply from the epithelial cells, causing them to undergo a horny change. The disease is not usually symmetric, as formerly stated, nor is it simultaneous in different toes.
But does histology give any clew to the way in which such isolation may be effected? Attempts were made to find an answer through consideration of the very peculiar character of the blood-supply in the brain. Here, as nowhere else, the terminal twigs of the arteries are arranged in closed systems, not anastomosing freely with neighboring systems.
The new science of Histology, as it is now called, was first brought fully before the profession of this country by the translation of Bichat's great work, "Anatomie Generale," by the late Dr. George Hayward.
Histology has revealed to us the extremely complicated structure and arrangement of the ganglion-cells. But, for the settlement of this momentous question, the discoveries of the last ten years with regard to the more minute occurrences in the process of fertilisation are of decisive importance.
Anatomy treats of the construction of the body—the parts which compose it, what they are like, and where located. Its main divisions are known as gross anatomy and histology.
All these parts constitute microscopic anatomy or 'Histology. These parts are constantly being changed; every part is constantly growing, decaying, and being replaced during the life of the animal.
The parallel between Biology and Geology, which I have drawn, is further illustrated by the modern growth of that branch of the science known as Petrology, which answers to Histology, and has made the microscope as essential an instrument to the geological as to the biological investigator.
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