The Arena, Volume 4, No. 23, October, 1891

by Various

When the microscope was first invented, it was regarded as a mere accessory, a plaything, an unnecessary addition, and an imposition upon the medical profession and upon the public in general. But since 1840, when the European oculists and scientists began to make microscopical researches and investigations, not only in the medical profession, but also in botanical and geological studies, etc., and since 1870, when, throughout the civilized world, the microscope came into general use in chemical analysis and other studies, it ceased to be considered an accessory, and is now regarded as an extremely necessary apparatus, especially in minute examinations and investigations; also in the advancement of every branch of science and art.

Had Galen, Celsus, Hippocrates, and the other great scientists of old, known the use of the microscope, they would have made no such grave blunders as in the advocation of the theory that the arteries of the human body contain and carry air during life, instead of oxygenized blood only. They were of the erroneous opinion that the blood stayed in the extremities, not to nourish and sustain the tissues, but simply to act as a humor in lubricating the same (tissues).

Then, again, had it not been for the microscope, the great English surgeon and physician, James Paget, would not have discovered that deadly parasite, the trichina-spiralis, which had already slaughtered thousands upon thousands of human beings. And yet the existence of trichina-spiralis may be dated as far back as the time of Moses, who even then advocated prohibition of the use of pork as a food, and who considered pork not only an unwholesome food, but dangerous and even poisonous.

The microscope is certainly the best friend that a scientist can have. A physician without a microscope is like a man without eyes: he is uncertain and unprotected and must be considered incompetent, simply because he cannot arrive at a correct and positive conclusion in diagnosing and prognosing his case.

The value of the microscope cannot be overestimated, at least in the examination of the sputa of a human being, and thus being able to state positively whether or not the man is suffering from consumption (Tuberculosis). How important it is to be able to state with certainty at an early date whether or not the patient is suffering from cancer of the stomach, by examining the vomits microscopically.

The microscope is composed of a simply constructed horse-shoe or tripod base with a column, tube, reflector, and lenses of different magnifying powers, ranging from one to five thousand diameters. It is a most extraordinary and at the same time a most simple apparatus, an invaluable instrument, whose use any person with a little skill can learn in a few hours’ practice.

Much has already been published of late years concerning the microscope applied in a medico-legal sense (examinations). This surely is a very broad field and much remains for future observation and investigation. Everything that concerns medical examinations in a legal sense or legal examinations in a medical sense can be facilitated and accurately determined by the use of the microscope. For instance, let me call your attention to the world-renowned “Cronin” case of Chicago, in which the medical experts demonstrated to a certainty that the blood, hair, and brain matter found in the Coulson cottage and sewer drop were those of a human being. And what was still more remarkable they demonstrated by the microscope accurately and positively that the hair and blood found in the cottage and fatal trunk were those of the late Dr. Cronin, only in a modified condition.

Without a doubt the microscope is the most advantageous and most efficacious apparatus that a scientist has ever invented and constructed. It is an especially powerful factor in enlightening complex and difficult cases concerning medico-legal examinations, where the combined efforts of an attorney and an expert microscopist are required. Within the last decade, scientists have demonstrated to a certainty the possibility of distinguishing old and dried human blood spots, whether on clothing, wood, iron, or any other object, from those of animal blood. Scientists, especially pathologists and histologists, have demonstrated the great value of the microscope in distinguishing not only the skin, blood, hair, and brain matter, but also the excretions and secretions of the human body from those of animals.

Again, the microscope applied in medico-legal practice, particularly in malpractice suits, suits for damages, those requiring the detection of adulteration of food or drink, is of the greatest importance. It is not less valuable in determining the purity of an article, especially whether or not the food or drink has spoiled or undergone fermentation, and in detecting the accumulation and development of microorganisms such as germs, bacilli, etc. Prominent among these uses are of course the detection of oleomargarine, the adulteration of drugs, liquors, milk, groceries, sausages, etc.

The utilization of the microscope as a factor in the solution of legal difficulties is as interesting as it is valuable, and in that connection I wish to cite a few lines from an exhaustive paper read by the Hon. Geo. E. Fell, M. D., F. R. M. S., before the American Society of Microscopists, relating to the “Examination of Legal Documents with the Microscope.”