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Updated: June 4, 2025
It is rejected by Müller, who ranks among the first physiologists of Germany; by Ehrenberg, one of the most distinguished microscopists in the world; and by Owen, who stands at the head of the school of comparative anatomy in England, if not in Europe.
Albert McCalla, at the meeting of the American Society of Microscopists, at Columbus, O. It consists of a small disk of silvered plate glass, c, about one-eighth of an inch thick, which is cemented by glycerine or some homogeneous immersion medium to the under surface of the glass-slide, s.
Although these bodies were seen they were regarded as accidental or secondary, and were not thought of as forming any serious objection to the conception of protoplasm as a definite chemical compound. But modern opticians improved their microscopes, and microscopists greatly improved their methods.
Let us look at the question as it presents itself to the layman, to men of science and experience, to microscopists, to bank officials and others having much to do with writing. An expert in handwriting occupies a totally anomalous position when called before a court as a witness.
The main thesis as to the similarity of development of vegetable and animal tissues and the cellular nature of the ultimate constitution of both was supported by a mass of carefully gathered evidence which a multitude of microscopists at once confirmed, so Schwann's work became a classic almost from the moment of its publication.
Spencer, which threw those of the Continent into the shade at once, and challenged competition with the work of the three great London opticians, were made in a half-cleared district of Central New York, where, in our pilgrimages to that Mecca of microscopists, Canastota, we found the shrine we sought in the midst of the charred stumps of the primeval forest. While Mr.
Repeated examinations of blood from patients in every stage of the disease failed to demonstrate the presence of microorganisms of any kind. My subsequent investigations in Havana, Vera Cruz, and Rio de Janeiro, made in 1887, 1888, and 1889, were equally unsuccessful. And numerous competent microscopists of various nations have since searched in vain for this elusive germ.
The slightest variation, in either the quantity or quality of the material employed in the infusion, is, as these eminent microscopists agree, invariably accompanied by the appearance of different forms of life, just as the slightest change in soil-conditions, such as that produced by the presence of one species of tree with another in natural truffle-grounds, will result in the appearance of another and altogether different plant, as well as truffle tuber.
The Thysanura, as the Poduras and their allies, the Lepismas, are called, have been generally neglected by entomologists, and but few naturalists have paid special attention to them. Of all those microscopists who have examined Podura scales as test objects, we wonder how many really know what a Podura is?
To that end I think that the bodies of hanged assassins and such persons of low degree as have been gathered to their fathers by the cares of public office or consumed by the rust of inactivity in prison should be handed over to the microscopists for examination. The bore, too, offers a fine field for research, and might justly enough be examined alive.
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