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Cases are sometimes met with in which relapses recur at regular intervals for several years, the tendency, however, being for the attacks to become milder as the virulence of the organisms becomes more and more attenuated. Clinical Features. Osteomyelitis in a patient over twenty-five is nearly always of the relapsing variety.
But without some indwelling principle of development and progress, how could the new wants arise? Spencer says this progress is the result of the action and reaction between organisms and their changing environment. But you must first get your organism before the environment can work its effects, and you must have something in the organism that organizes and reacts from the environment.
Several towns in Illinois and in Wisconsin have established plants for the purification of sewage by means of microbe life. The collections of organisms invisible to the naked eye are to be kept in great antiseptic tanks, and employed in the purification of the city 's refuse. Mosquitoes will ultimately be destroyed, undoubtedly, by breeding among them smaller creatures fatal to their existence.
The marrowy organisms, with skins that shed water like the backs of ducks, with smooth surfaces neatly padded beneath, and velvet linings to their singing-pipes, are not so common among us as that other pattern of humanity with angular outlines and plane surfaces, and integuments, hair like the fibrous covering of a cocoa-nut in gloss and suppleness as well as color, and voices at once thin and strenuous, acidulous enough to produce effervescence with alkalis, and stridulous enough to sing duets with the katydids.
There are some forms of what are called malignant carbuncle which have been shown to be actually effected by a sort of fermentation, if I may use the phrase, by a sort of disturbance and destruction of the fluids of the animal body, set up by minute organisms which are the cause of this destruction and of this disturbance; and only recently the study of the phenomena which accompany vaccination has thrown an immense light in this direction, tending to show by experiments of the same general character as that to which I referred as performed by Helmholz, that there is a most astonishing analogy between the contagion of that healing disease and the contagion of destructive diseases.
My hypothesis of the creation of organisms by heterogeneous generation, however, is distinguished very essentially from Darwin's by the entire absence of the principle of useful variations and their natural selection: and my fundamental conception is this, that a great plan of development lies at the foundation of the origin of the whole organic world, impelling the simpler forms to more and more complex developments.
When we examine the most minute organisms, we find clear evidence in their voluntary powers of motion that these creatures possess a will, and that such Will must be conveyed by a nervous system of an infinitesimally minute description.
Professor Tyndall has gone further than this, and has shown us that on the tops of lofty mountains the air is so pure, so free from organisms, that decomposition is impossible.
Thus adaptation becomes a principle which transcends the limits of natural science and pervades the whole domain of life. Goette observes that Darwin spoke of useful, less useful and indifferent organisms, by which he meant those adaptations destined for particular vital functions which tend to make the organs more and more specialized.
Let it suffice to say that they were on the lines first laid down by Redi and greatly elaborated by Spallanzani, namely the exclusion from the fluids or other substances under examination of all possible contamination by minute organisms in the air. Spallanzani knew nothing of these organisms; they were not discovered until many years after his death.
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