Associations and Magazines. 151 



Jahresbericht iiber die Leistungen und Fortschritte der 

 Forstwirthschaft (since 1880). 



Besides this more scientific magazine literature, 

 "Pocket Books" and "Calendars" have been pub- 

 lished from early times, the regular annual appearance 

 of the latter, giving detailed statistics, personalia, 

 tables useful in the practice, etc., dates from 1851. 



With the accomplishment of the unity of the empire 

 in 1871, with the establishment of the Experiment 

 Stations and their association in 1872, and with the 

 organization of the Society of German Foresters, which 

 dates from the same year, a new and most active era 

 in the development of forestry science may be recog- 

 nized, the tendency of which is to lift the art out of the 

 shackles of empiricism, and place it on a more scien- 

 tific basis. 



