As with trees so with the tree communities called forests. Our duty in New Jersey is to improve the forests we have rather than to concern ourselves about getting more. Of course, waste land may be redeemed by planting with trees, but where there is a remnant of the old forest, nature can be trusted to bring another if she is given a fair chance. The forest secured in this way may not yield so much lumber as one that was planted, and it will not satisfy a forester, but it will answer our most immediate needs, and can be secured more quickly than any other. And again, as with trees, let no one fear to have a forest cut off when its time comes. Forest trees were made for use and if they are not used as they mature, nature will get rid of them by decay. That this must be so will appear when one observes that in any piece of native woods room is made for young trees by the fall of old ones that have lived their term. WHY FORESTS ARE GOOD Nature clothed most of the habitable earth with forests of one kind or another and evidently meant that they should serve mankind. This they do by furnishing wood for shelter and for warmth (seven-eighths of the people of the world still use wood for fuel), by providing grateful shade in summer and protection from cold winds in winter, by preventing the soil on steep hillsides from being lost by erosion, by regulating the flow of streams. The contention that forests cause rainfall, or materially influence the climate of a country, is not established. The weight of evidence indicates that forests thrive in proportion to the rainfall rather than that the rain falls in proportion to the extent of forests. And in respect to stream flow we must distinguish between a mountainous or hilly country and a country that is flat; and whether the rain commonly falls in brief, heavy storms or in frequent gentle showers. For instance, we can say with assurance that in North Jersey a forested watershed will discharge a purer, more regular stream than one that is unforested, while in South Jersey the influence of the forest upon the streams is negligible. THE FORESTS OF NEW JERSEY As the climate of New Jersey is much the same in all parts, the character of our forests is determined chiefly by soil conditions. Fortunately we have a great diversity, and between the northern and southern sections, strong contrasts. The line separating these sections is nowhere sharply defined but is commonly assumed to run more or less irregularly from Long Branch to Salem.