Now, while Spencer was probably right in saying that fertilisation promotes change, we cannot think that he succeeded in finding what he was seeking, namely a primary physiological reason why sexual reproduction should occur.
Clearly Spencer had a prevision of what Roux calls "Der Kampf der Theile im Organismus" (The struggle of parts within the organism), and we have here another example of his biological insight.
We may also try to show how the process is justified by its advantages either self-regarding or species-maintaining.
We may try to discover what factors may have operated in the course of evolution in raising the process from one step of differentiation to another.
In 1881 Spencer felt in a new way the universal call "Il faut etre citoyen"; he was drawn into practical action, and although this led to the greatest disaster of his life, the cause was worthy of the sacrifice.
And the appearances and disappearances of species which the geological record shows us, as well as the connections between successive groups of species from early eras down to our own, cease to be inexplicable" (Principles of Biology, i.
This multiplication of effects conspires, with the instability of the homogeneous, to work an increasing multiformity of structure in an organism.
Evolution being a universal process, one and continuous throughout all forms of existence, there can be no break, no change from one group of concrete phenomena to another without a bridge of intermediate phenomena.
Segregation, which is a process tending ever to separate unlike units, and to bring together like units, so serving continually to sharpen or make definite differentiations otherwise caused.
In 1845 he had a scheme of quasi-aerial locomotion: not a flying machine but "something uniting terrestrial traction with aerial suspension"; but even on paper it broke down.
The appreciability of the change will depend on the amount and nature of the modification, and on the intimacy of the correlationsubsisting in the organism.
He gave clear expression to the doctrine, which many workers had been reaching towards, of the correlation of mind and body.
In correlation with the great breadth of the posterior part of the cranium, the rami of the mandibles diverge widely posteriolaterally and the angular processes are remarkably elongated.
The ages of the Hay Springs sites are approximately the same, but their correlation is presently under debate.
Before accepting any one of the systems of correlation above mentioned, the student is strongly urged to examine with care The Books of Chilan Balam.
The correlation of Maya and Christian chronology herein followed is that suggested by the writer in "The Correlation of Maya and Christian Chronology" (Papers of the School of American Archaeology, No.
In the Amniota, the branchial arches become still more degenerated, in correlation with the total disappearance of a branchial respiration at all periods of life.
In correlation with the vertebral constrictions of the notochord the vertebral bodies are biconcave.
In view of the close correlation of the muscular and nervous systems, this also made great advance in structure and function.
Moreover, the limbs and other organs were also more or less modified, either in consequence of remote correlation to the preceding or owing to new adaptations.
It is the chief merit of Darwin that he explained by his theory of selection the correlation of the laws of heredity and adaptation that Lamarck had recognised, and pointed out the true way to reach a causal interpretation of evolution.
The course of historic development is a result of the correlation of the two tendencies, and they must be carefully distinguished.
Hence the idea of the 'correlation of forces' which was the immediate forerunner of the doctrine of the conservation of energy.
This is the doctrine of correlation of forces and conservation of energy, one of the grandest ideas of modern times.
Physiologists have established the correlation of vital with chemical and physical forces,[40] and probably in some sense, at least, of mental with vital forces.
But soon vital force also yielded to the general law of correlation of natural forces.
Life history and correlation of stages of insect and nut development.
This accidental character of appointments was further intensified when later Kerensky abolished for the duration of the War all the existing qualifications, as well as the correlation of rank and office.
It is otherwise with terms that really have the correlationyou claim for consciousness and matter.
If this is more than a word, it is a self-contradiction, since subjectivity is subjectivity only in the fact of correlation with objectivity.
There is, however, between the parental and the filial series a correlation of +0.
This lack of correlation in the Silkie hybrids is perhaps due to the heavy regression in toe-number characteristic of the second hybrid generation.
A casual examination of table 38 would seem to show a correlation between the grade of booting of the parents and that of the average of their progeny.
The answer to this question should be given by the correlation between total number of toes in the two parents and average number of toes in their offspring, as given in table 11.
I have calculated, in the usual biometric fashion, the coefficient of correlation between average parental and filial grades, and found it to be -0.
This correlation indicates, without exactly measuring, heredity in grade of booting.
This agrees with Pearson's theoretical coefficient of correlation between offspring and parent.
This can only be interpreted to mean that in a homogeneous assemblage of families there is no correlation between the grade of booting of parents and offspring.
This can be determined by calculating the correlation between the grades of parents and progeny.
Inside of any part of this table it appears that, on the whole, as the average grade of the boot in the progeny diminishes that of the parentage diminishes, although the correlation is by no means perfect.
Any attempt to disturb or invert this correlation was a wilful running in the teeth of the laws of nature, a rebellion against the divine order of things.
It seeks to find happiness in a correlation and balancing of individual selves, not in the independent conformity of each self to a supreme self.
Only in this correlation of duties did each class find its usefulness and satisfaction.
In some cases we find correlationwithout being able even to conjecture what is the nature of the connexion, as with various correlated monstrosities and diseases.
The case of the Jacobin-pigeon is more curious, for the wing and tail feathers are remarkably long; and this apparently has arisen in correlation with the elongated and reversed feathers on the back of the neck, which form the hood.
Of all the laws governing variability, that of correlation is the most important.
The correlation between these changes is well shown when one of the two upper petals alone loses its dark mark, for in this case the nectary does not entirely abort, but is usually much reduced in length.
Professor Rolleston, also, informs me that the incisor teeth are sometimes furnished with a vascular rim in correlation with intra-pulmonary deposition of tubercles.
One of the simplest cases of correlation is that a modification which arises during an early stage of growth tends to influence the subsequent development of the same part, as well as of other and intimately connected parts.
In the first place, there is no such correlation or equivalence as is alleged between physical forces and the phenomena of consciousness.
The correlation of forces exhibits Mind as in nowise a product of Matter, but as something in its growth and manifestations outside and parallel.
Since the original publication of this Essay, renewed investigation and study have led me to conclude that the correlation of the British and Continental glacial series is even more simple than I had supposed.
The following case affords, I think, the best evidence that these marks have really been developed in correlation with the nectary.
The correlation of a white colour and blue eyes in male cats with deafness, and of the tortoise-shell marking with the female sex of the same animal, are two well-known but most extraordinary cases.
The scientist has reason to look upon this particular case of graphological correlation with distrust.
The lowest correlation refers to the single letters, after that to the syllables and words.
Correlation psychology proclaims that a particular individual possesses or does not possess certain traits because he shows or does not show some other definite qualities.
Whether or not the necessity of correlation decreases as age increases we need not discuss here, but that there is absolute need of it in the kindergarten probably no one will deny.
Report on Correlationof Studies by Committee of Fifteen.
Correlation comes in wherever it may, and the association of ideas obtained in class-room and workroom is closely joined.
Soap, starch, water, and bluing have their composite qualities and are analyzed, and no more interesting correlation is there than that of the laundry with the class-room.
Dronvire is a much better analyst-synthesist than I am; as soon as any significant correlation is possible he will know it.
The slight positive correlation between deaths from thionite and the arrival of Spaceways vessels has disappeared.
I don't know whether you're justified or not in assuming a high positive correlation between a certain kind of mental ability and technological advancement.
This result flows at once from the idea of a correlation, in virtue of which the two terms mutually imply each other, and are the reciprocal condition one of the other, a correlation of which the purest product is beauty.
No doubt this correlation of the two impulsions is simply a problem advanced by reason, and which man will only be able to solve in the perfection of his being.
Its commanders were not troubled by any of those problems as to the correlation and subordination of the various arms, which led to so many unhappy experiments among the generals of other nations.
