4. _The region of Coniferous trees._--Botanically this region is best distinguished by the prevalence of coniferous trees, forming vast forests, which if not kept down by man (and by goats) would cover the slopes of the Alps. The prevailing species are the common fir and the silver fir. In districts where granite abounds, the larch flourishes and reaches a greater size than any other tree. Less common are the Scotch fir and the arolla, or Siberian fir. In the Eastern Alps the dwarf pine becomes conspicuous, forming a distinct zone on the higher mountains above the level of other firs. The pine forests play a most important part in the natural economy of the Alps; and their preservation is a matter of very great importance to the future inhabitants. But in some places they have been considerably diminished by cutting. This has especially happened in the neighbourhood of mines; and in consequence the people of the unfrequented communes have become so alive to this that some jealousy is felt of strangers wandering among the mountains, lest they should discover metals and cause the destruction of the woods. Their fears are not unreasonable; for the forests, besides exerting a good deal of influence on rainfall and climate, form natural defences against the rush of the spring avalanches (see chapter iii., page 93). It is recorded that after the war of 1799, in which many of those near the St. Gothard Pass were destroyed, the neighbouring villages suffered terribly from this scourge. Hence the laws do not allow of timber being cut in certain forests called "Bannwalde;" and in most places the right of felling trees is strictly regulated, and the woods are under the inspection of officials. In spots high up among the mountains, to which access is difficult, the timber is converted into charcoal, which is then brought down in sacks by horses and mules. There are two ways in which timber is conveyed down from the forest: either it is cut up into logs some five feet long, and thrown into a neighbouring torrent, which brings it down over cliff and gorge to the valley below; or else trough-like slides are constructed along the mountain-sides, down which the trunks themselves are launched. It is this region of coniferous trees which mainly determines the manner of life of the population of the Alps. In the month of May the horned cattle, having been fed in houses during the winter (as they are in the Scotch Highlands, where the cowsheds are called "byres"), are led up to the lower pastures. The lower châlets, occupied in May and part of June, generally stand at about the upper limit of the mountain region. Towards the middle or end of June the cattle are moved up to the chief pastures, towards the upper part of the region of coniferous trees, where they usually remain for the next two or three months. But there are some available pastures still higher up, and hither some of the cattle are sent for a month or more.