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Instances of the discovery of toads and frogs in solid rocks need not be specially given; suffice it to say, that these narratives are repeated year by year with little variation. A large block of stone or face of rock is detached from its site, and a toad or frog is seen hereafter to be hopping about in its usual lively manner.
However they embarked all their troops with such precipitation that they left behind their cannon, &c., and those dead of their wounds, unburied." The particulars of this singularly interesting ruse de guerre are detailed in all the accounts of the Spanish invasion; and in each with some variation, and in all rather more circumstantially than the above.
From the moment the tunnels were started, here was preserved a faithful record of every slightest variation of air pressure. "Telephone down into the tube and have Capps come up," said Craig at length, glancing at Orton's desk clock. "Taylor will be here pretty soon, and I want Capps to be out of the tunnel by the time he comes. Then get Shelton, too."
He slacks his rein one instant as the gray rises! the rugged rails are cleared, and the firm pull supports him! but Harry moves not in the saddle no! not one hair's breadth! A five foot fence to him is nothing! You shall not see the slightest variation between his attitude in that strong effort, and in the easy gallop.
In that case the parallel has only a metaphorical value, and the reason why variation must cease and species die out is still to seek. In short, if that which continues the series of individuals in propagation, whether like or unlike the parents, be a force in the physical sense of the term, then there is abundant provision in Nature for its indefinite replenishment.
Now variation, as we have seen, is the raw material upon which natural selection acts to create the higher types.
From the first variation that started him on his way in his line of descent, variation must have been more and more active till he varied in the direction of reason, long before the dawn of history, since which time his progress has been by rapid strides and more and more rapid till we see his leaps forward in recent times.
There is no variation in this step; but you can vary the movement by going backwards or forwards at pleasure, instead of continuing the rotatory motion. The Valse
Function is the expression of molecular forces and arrangements no doubt; but, does it follow from this, that variation in function so depends upon variation in structure that the former is always exactly proportioned to the latter?
Then, from the many slight successive steps of variation having supervened at a rather late age, and having been inherited at a corresponding age, the young of the new species of our supposed genus will manifestly tend to resemble each other much more closely than do the adults, just as we have seen in the case of pigeons. We may extend this view to whole families or even classes.
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