This contract is usually renewed from year to year.
The marriage rate varies as in other countries from year to year according to the degree of prosperity prevailing.
As in most civilized countries, the number of suicides in Italy has increased from year to year.
The increasing development of the wood as the tree grows older is largely due to the demands for the conduction of water and mineral matters dissolved in it, which are made by the increased number of leaves which from year to year it bears, and which must each be put into communication with the central mass by the formation of new vascular bundles.
A similar comparison for the several sections of Great Britain, as set forth in Table VI., shows that to England belong about 95% of the wheat area, over 80% of the barley area, over 60% of the oats area, and over 70% of the potato area, and these proportions do not vary much from year to year.
