1. Some major problems of the surface flow of China The calulation of the hydrographical records over 200 stations makes it possible to prepare two maps, viz.,that of the annual discharge (in m3/sec) of the different rivers showing the gradual increase toward dowmstream and that of the relative discharge (in litre/sec/km2).
Observations of shelter-belt effects were made by the writer in spring of 1955,in the sand dune region, western Hopei, where dcns}ly planted belts of cedartrees(Thuja Orientalis), with an average height of seven metres and a net of insu-fflation belts of black locust (Robinia Psendoacacia) with an average height of 4 metres wera established.
Numerous records of using sheep and fox furs can be found in ancient Chinese literature and history. Now-a-days, the extensive usa of the various animal pel-tries has rendered the fur animals in our country a kind of natural resources of commercial importance both for domes:ic circulation and for exportation.
