This method can only be carried out in still water, and where strong and tight framing can be built which will prevent the concrete from escaping.
We now arrive at the period when the doctrine of organic evolution was established by Darwin, and when naturalists, being convinced by him as they had not been by the transmutationists of fifty years' earlier date, were compelled to take an entirely new view of the significance of all attempts at framing a " natural " classification.
His right of recommending measures to the legislature (which does not formally include that of framing and presenting bills, but practically permits him to have a bill prepared and use all his influence on its behalf) is of greater value according to the extent to which he leads the public opinion of his state.
Thus it comes that comparatively slight use is made of the experience of the permanent financial officials in the framing of revenue-raising and appropriation bills.
But concrete is hampered by the fact that the surface always has to be formed by means of wooden or other framing, and in the case of thin walls or floors this framing becomes a serious item, involving expense and delay.
