. Bulletin (Pennsylvania Abteilung der Wälder und Gewässer), No. 36-37. Wälder und Forstwirtschaft. hi II ein Strom Umfrage des Commonwealth nun im Gange ist. Die Umfrage zeigt, dass in den sechs Grafschaften von Bedford, Fulton, Franklin, Cameron, Monroe, und Hecht, in dem die Befragung durchgeführt wurde, gibt es 315 Meilen der reinen Gebirgsbächen gegenüber 15 Meilen, die belastet sind. Es ist erwähnenswert, dass nicht einer der 74 Ströme, die in den staatlichen Waldflächen in diesen Grafschaften stammen verunreinigt ist. In der heutigen Zeit 14 Prozent der Waldfläche der SUS-quehanna Fluss-wasserscheide, 15.

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. Bulletin (Pennsylvania Department of Forests and Waters), no. 36-37. Forests and forestry. hi II A stream survey of the Commonwealth is now in progress. The survey shows that in the six counties of Bedford, Fulton, Franklin, Cameron, Monroe, and Pike, in which the survey has been completed, there are 315 miles of pure mountain streams as against 15 miles that are polluted. It is worth noting that not one of the 74 streams which originate within the State forest areas in these counties is contaminated. At the present time 14 per cent of the forest area of the Sus- quehanna River watershed, 15 per cent of the Juniata Kiver watershed, and 22 per cent of the West Branch of the Susquehanna River water- shed are embraced within the State forests. Special efforts are being made by the Depart- ment of Forests and Waters to safeguard and increase the water supply originating within the State forests. For planting on privately-owned watersheds throughout the Commonwealth, large numbers of trees are distributed from the State nurseries. Since 1910, when the forest tree distribution program was started, 122 water companies have planted a total of more than 10, 000, 000 trees on their watersheds. All of these trees were secured from the State nurseries. Several million ad- ditional trees, purchased from private nurseries, were also planted on the watersheds. Pennsyl- vania s reforestation program is a very helpful factor in conserving the supplies of potable water needed by the people and the industries of the Commonwealth. 76 OBJECT LESSONS IN PRACTICAL FORESTRY Scattered throughout the State forests are many interesting lessons in practical forestry. They point the way to better forest practices. From these object lessons the people of Penn- sylvania and other States can learn helpful les- sons in forest protection, forest tree planting, forest improvement work, and many other forest activities. If one wants to know how to plant. Many Special Study Plots in the State Forests P

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• bookyear1923