一、前言 一九五六年六月底七月初,由于工作关系,有机会到河北省承德专区南部兴隆县的雾灵山林区(原属前热河省),在比期间,对雾灵山龙潭沿山沟进行了一些观察。现将观察的结果,作为一些心得体会写在后面备供参考,并以此就教于从事林业工作的同志们!如有不当之处,希不咎指正(附路线及地形简单示意图)。 I. Introduction By the end of June 5, 1956, at the beginning of July, due to the working relationship, there was a chance to visit Wuling Mountain Forest District (formerly Rehe Province) in Xinglong County, southern Chengde Prefecture, Hebei Province. In the meantime, Ravine made some observations. The results of the observation are written as some of the feelings and experiences for reference later, so as to teach the comrades engaged in forestry work. If there are any discrepancies, they should be rewarded (with a simple sketch of the route and topography).