Geology.—The surface in Denmark is almost everywhere formed by the so-called Boulder Clay and what the Danish geologists call the Boulder Sand. The former, as is well known, owes its origin to the action of ice on the mountains of Norway in the Glacial period. It is unstratified; but by the action of water on it, stratified deposits have been formed, some of clay, containing remains of arctic animals, some, and very extensive ones, of sand and gravel. This boulder sand forms almost everywhere the highest hills, and besides, in the central part of Jutland, a wide expanse of heath and moorland apparently level, but really sloping gently towards the west. The deposits of the boulder formation rest generally on limestone of the Cretaceous period, which in many places comes near the surface and forms cliffs on the sea-coast. Much of the Danish chalk, including the well-known limestone of Faxe, belongs to the highest or “Danian” subdivision of the Cretaceous period. In the south-western parts a succession of strata, described as the Brown Coal or Lignite formations, intervenes between the chalk and the boulder clay; its name is derived from the deposits of lignite which occur in it. It is only on the island of Bornholm that older formations come to light. This island agrees in geological structure with the southern part of Sweden, and forms, in fact, the southernmost portion of the Scandinavian system. There the boulder clay lies immediately on the primitive rock, except in the south-western corner of the island, where a series of strata appear belonging to the Cambrian, Silurian, Jurassic and Cretaceous formations, the true Coal formation, &c., being absent. Some parts of Denmark are supposed to have been finally raised out of the sea towards the close of the Cretaceous period; but as a whole the country did not appear above the water till about the close of the Glacial period. The upheaval of the country, a movement common to a large part of the Scandinavian peninsula, still continues, though slowly, north-east of a line drawn in a south-easterly direction from Nissumfjord on the west coast of Jutland, across the island of Fyen, a little south of the town of Nyborg. Ancient sea-beaches, marked by accumulations of seaweed, rolled stones, &c., have been noticed as much as 20 ft. above the present level. But the upheaval does not seem to affect all parts equally. Even in historic times it has vastly changed the aspect and configuration of the country.
Climate, Flora, Fauna.—The climate of Denmark does not differ materially from that of Great Britain in the same latitude; but whilst the summer is a little warmer, the winter is colder, so that most of the evergreens which adorn an English garden in the winter cannot be grown in the open in Denmark. During thirty years the annual mean temperature varied from 43.88° F. to 46.22° in different years and different localities, the mean average for the whole country being 45.14°. The islands have, upon the whole, a somewhat warmer climate than Jutland. The mean temperatures of the four coldest months, December to March, are 33.26°, 31.64°, 31.82°, and 33.98° respectively, or for the whole winter 32.7°; that of the summer, June to August, 59.2°, but considerable irregularities occur. Frost occurs on an average on twenty days in each of the four winter months, but only on two days in either October or May. A fringe of ice generally lines the greater part of the Danish coasts on the eastern side for some time during the winter, and both the Sound and the Great Belt are at times impassable on account of ice. In some winters the latter is sufficiently firm and level to admit of sledges passing between Copenhagen and Malmö. The annual rainfall varies between 21.58 in. and 27.87 in. in different years and different localities. It is highest on the west coast of Jutland; while the small island of Anholt in the Cattegat has an annual rainfall of only 15.78 in. More than half the rainfall occurs from July to November, the wettest month being September, with an average of 2.95 in.; the driest month is April, with an average of 1.14 in. Thunderstorms are frequent in the summer. South-westerly winds prevail from January to March, and from September to the end of the year. In April the east wind, which is particularly searching, is predominant, while westerly winds prevail from May to August. In the district of Aalborg, in the north of Jutland, a cold and dry N.W. wind called skai prevails in May and June, and is exceedingly destructive to vegetation; while along the west coast of the peninsula similar effects are produced by a salt mist, which carries its influence from 15 to 30 m. inland.
The flora of Denmark presents greater variety than might be anticipated in a country of such simple physical structure. The ordinary forms of the north of Europe grow freely in the mild air and protected soil of the islands and the eastern coast; while on the heaths and along the sandhills on the Atlantic side there flourish a number of distinctive species. The Danish forest is almost exclusively made up of beech, a tree which thrives better in Denmark than in any other country of Europe. The oak and ash are now rare, though in ancient times both were abundant in the Danish islands. The elm is also scarce. The almost universal predominance of the beech is by no means of ancient origin, for in the first half of the 17th century the oak was still the characteristic Danish tree. No conifer grows in Denmark except under careful cultivation, which, however, is largely practised in [Jutland] (q.v.). But again, abundant traces of ancient extensive forests of fir and pine are found in the numerous peat bogs which supply a large proportion of the fuel locally used. In Bornholm, it should be mentioned, the flora is more like that of Sweden; not the beech, but the pine, birch and ash are the most abundant trees.
The wild animals and birds of Denmark are those of the rest of central Europe. The larger quadrupeds are all extinct; even the red deer, formerly so abundant that in a single hunt in Jutland in 1593 no less than 1600 head of deer were killed, is now only to be met with in preserves. In the prehistoric “kitchen-middens” (kjökkenmödding) and elsewhere, however, vestiges are found which prove that the urochs, the wild boar, the beaver, the bear and the wolf all existed subsequently to the arrival of man. The usual domestic animals are abundantly found in Denmark, with the exception of the goat, which is uncommon. The sea fisheries are of importance. Oysters are found in some places, but have disappeared from many localities, where their abundance in ancient times is proved by their shell moulds on the coast. The Gudenaa is the only salmon river in Denmark.
Population.—The population of Denmark in 1901 was 2,449,540. It was 929,001 in 1801, showing an increase during the century in the proportion of 1 to 2.63. In 1901 the average density of the population of Denmark was 165.2 to the square mile, but varied much in the different parts. Jutland showed an average of only 109 inhabitants per square mile, whilst on the islands, which had a total population of 1,385,537, the average stood at 272.95, owing, on the one hand, to the fact that large tracts in the interior of Jutland are almost uninhabited, and on the other to the fact that the capital of the country, with its proportionately large population, is situated on the island of Zealand. The percentages of urban and rural population are respectively about 38 and 62. A notable movement of the population to the towns began about the middle of the 19th century, and increased until very near its end. It was stronger on the islands, where the rural population increased by 5.3% only in eleven years, whereas in Jutland the increase of the rural population between 1890 and 1901 amounted to 12.0%. Here, however, peculiar circumstances contributed to the increase, as successful efforts have been made to render the land fruitful by artificial means. The Danes are a yellow-haired and blue-eyed Teutonic race of middle stature, bearing traces of their kinship with the northern Scandinavian peoples. Their habits of life resemble those of the North Germans even more than those of the Swedes. The independent tenure of the land by a vast number of small farmers, who are their own masters, gives an air of carelessness, almost of truculence, to the well-to-do Danish peasants. They are generally slow of speech and manner, and somewhat irresolute, but take an eager interest in current politics, and are generally fairly educated men of extreme democratic principles. The result of a fairly equal distribution of wealth is a marked tendency towards equality in social intercourse. The townspeople show a bias in favour of French habits and fashions. The separation from the duchies of Schleswig and Holstein, which were more than half German, intensified the national character; the Danes are intensely patriotic; and there is no portion of the Danish dominions except perhaps in the West Indian islands, where a Scandinavian language is not spoken. The preponderance of the female population over the male is approximately as 1052 to 1000. The male sex remains in excess until about the twentieth year, from which age the female sex preponderates in increasing ratio with advancing age. The percentage of illegitimacy is high as a whole, although in some of the rural districts it is very low. But in Copenhagen 20% of the births are illegitimate. Between the middle and the end of the 19th century the rate of mortality decreased most markedly for all ages. During the last decade of the century it ranged between 19.5 per thousand in 1891 and 15.1 in 1898 (17.4 in 1900). Emigration for some time in the 19th century at different periods, both in its early part and towards its close, seriously affected the population of Denmark. But in the last decade it greatly diminished. Thus in 1892 the number of emigrants to Transatlantic places rose to 10,422 but in 1900 it was only 3570. The great bulk of them go to the United States; next in favour is Canada.
Communications.—The roads of Denmark form an extensive and well-maintained system. The railway system is also fairly complete, the state owning about three-fifths of the total mileage, which amounts to some 2000. Two lines enter Denmark from Schleswig across the frontier. The main Danish lines are as follows. From the frontier a line runs east by Fredericia, across the island of Fünen by Odense and Nyborg, to Korsör on Zealand, and thence by Roskilde to Copenhagen. The straits between Fredericia and Middelfart and between Nyborg and Korsör are crossed by powerful steam-ferries which are generally capable of conveying a limited number of railway wagons. This system is also in use on the line which runs south from Roskilde to the island of Falster, from the southernmost point of which, Gjedser, ferry-steamers taking railway cars serve Warnemünde in Germany. The main lines in Jutland run (a) along the eastern side north from Fredericia by Horsens, Aarhus, Randers, Aalborg and Hjörring, to Frederikshavn, and (b) along the western side from Esbjerg by Skjerne and Vemb, and thence across the peninsula by Viborg to Langaa on the eastern line. The lines are generally of standard gauge (4 ft. 8½ in.), but there is also a considerable mileage of light narrow-gauge railways. Besides the numerous steam-ferries which connect island and island, and Jutland with the islands, and the Gjedser-Warnemünde route, a favourite passenger line from Germany is that between Kiel and Korsör, while most of the German Baltic ports have direct connexion with Copenhagen. With Sweden communications are established by ferries across the Sound between Copenhagen and Malmö and Landskrona, and between Elsinore (Helsingör) and Helsingborg. The postal department maintains a telegraph and telephone service.
Industries.—The main source of wealth in Denmark is agriculture, which employs about two-fifths of the entire population. Most of the land is freehold and cultivated by the owner himself, and comparatively little land is let on lease except very large holdings and glebe farms. The independent small farmer (bönder) maintains a hereditary attachment to his ancestral holding. There is also a class of cottar freeholders (junster). Fully 74% of the total area of the country is agricultural land. Of this only about one-twelfth is meadow land. The land under grain crops is not far short of one-half the remainder, the principal crops being oats, followed by barley and rye in about equal quantities, with wheat about one-sixth that of barley and hardly one-tenth that of oats. Beet is extensively grown. During the last forty years of the 19th century dairy-farming was greatly developed in Denmark, and brought to a high degree of perfection by the application of scientific methods and the best machinery, as well as by the establishment of joint dairies. The Danish government has assisted this development by granting money for experiments and by a rigorous system of inspection for the prevention of adulteration. The co-operative system plays an important part in the industries of butter-making, poultry-farming and the rearing of swine.
Rabbits, which are not found wild in Denmark, are bred for export. Woods cover fully 7% of the area, and their preservation is considered of so much importance that private owners are under strict control as regards cutting of timber. The woods consist mostly of beech, which is principally used for fuel, but pines were extensively planted during the 19th century. Allusion has been made already to the efforts to plant the extensive heaths in [Jutland] (q.v.) with pine-trees.
Agriculture.—Rates and taxes on land are mostly levied according to a uniform system of assessment, the unit of which is called a Tonde Hartkorn. The Td. Htk., as it is usually abbreviated, has further subdivision, and is intended to correspond to the same value of land throughout the country. The Danish measure for land is a Tonde Land (Td. L.), which is equal to 1.363 statute acres. Of the best ploughing land a little over 6 Td. L., or about 8 acres, go to a Td. Htk., but of unprofitable land a Td. Htk. may represent 300 acres or more. On the islands and in the more fertile part of Jutland the average is about 10 Td. L., or 13½ acres. Woodland, tithes, &c., are also assessed to Td. Htk. for fiscal purposes. In the island of Bornholm, the assessment is somewhat different, though the general state of agricultural holdings is the same as in other parts. The selling value of land has shown a decrease in modern times on account of the agricultural depression. A homestead with land assessed less than 1 Td. Htk. is legally called a Huus or Sted, i.e. cottage, whilst a farm assessed at 1 Td. Htk. or more is called Gaard, i.e. farm. Farms of between 1 and 12 Td. Htk. are called Bondergaarde, or peasant farms, and are subject to the restriction that such a holding cannot lawfully be joined to or entirely merged into another. They may be subdivided, and portions may be added to another holding, but the homestead, with a certain amount of land, must be preserved as a separate holding for ever. The seats of the nobility and landed gentry are called Herregaarde. The peasants hold about 73% of all the land according to its value. As regards their size about 30% are assessed from 1 to 4 Td. Htk.; about 33% from 4 to 8 Td. Htk.; the remainder at about 8 Td. Htk. An annual sum is voted by parliament out of which loans are granted to cottagers who desire to purchase small freehold plots.