130 Germany. 



the torrents. A new aspect of the results of forest 

 devastation began to be recognized, which found 

 excellent expression in a memoir by Moreau de Jonnes 

 (Brussels, 1825), on the question "What changes does 

 denudation effect on the physical condition of the 

 country." This being translated into German by 

 Wiedenmann, was widely spread, being interestingly 

 written, although not well founded on facts of natural 

 history and physical laws. Nevertheless, sufficient 

 experience as regards the effect of denudation in 

 mountainous countries had also accumulated in south- 

 west Germany and in the Austrian Alps, and the 

 necessity of protective legislation was recognized. 

 This necessity first found practical expression in the 

 Bavarian law of 1852, in Prussia in 1875, and in Wiirt- 

 temberg in 1879. But a really proper basis for formu- 

 lating a policy or argument for protective legislation 

 outside of the mountainous country is still absent, 

 although for a number of years attempts have been 

 made to secure such basis. 



8. Forestry Science and Literature* 



The habit of writing encyclopaedic volumes, which 

 the Cameralists and learned hunters had inaugurated 

 in the preceding century, continued into the new one, 

 and we find Hartig, Cotta, Pfeil and Hnndeshagen each 

 writing such encyclopaedias. Carl Heyer began one in 

 separate volumes, but completed only two of them. 

 Even an encyclopaedic work in monographs by several 



*The necessarily brief statements which are made under this heading pre- 

 suppose knowledge of the technical details to which they refer. In this short 

 history it was possible only to sketch rapidly the development of the science in 

 terms familiar to the professional man. 



