I'KRIODICAL LITKRATURK '-H 



Research Association (which meets as a rule twice a year), and this. 

 in turn, united with the International Forest Association. 



The Prussian Research Institute was started in 1S71, though not 

 officially created till 1872, and is united with the Forest College at 

 Eberswalde. There are six branches : 



1. Silviculture 



2. Physical chemistry 



3. Meteorology 



4. Plant physiology 



5. Zoology 



6. Mycology (started in 1899) 



According to original arrangements, the local forest officer was in 

 charge of the outstation experiment under the control of the Regicr- 

 uiigsforstbeaiiitcn and directed by the research officer; but this was 

 not successful. Pressure of other work, lack of technical knowledge 

 and training in experimental work, and other reasons tended to show 

 that the local forest officer w^as not the man to carry out the experi- 

 ments. 



The principal work of the silvicultural branch is the compilation of 

 yield tables and the collection of statistics connected with them, while 

 other work embraces relations between stacked and solid volume, ex- 

 periments with exotics, experiments concerning root-formation, ma- 

 nure, technical properties of wood, seed tests, etc. 



It is worth noting that the tests of strength of wood, etc., are done 

 by technical experts at Charlottenburg, and not by the Forest Research 

 Institute, and that the silviculturist represents the forest side of these 

 experiments. 



The meteorology branch is concerned with experiments dealing with 

 the influence of forests on climate and not so much with the reverse. 

 All kinds of observations on temperature, humidity, winds, etc., are 

 made. 



The plant physiology branch is purely botanical. It takes up such 

 subjects as researches on bacteria, formation of annual rings, grass 

 floras, influence of the district on seeds, influence of soil factors on 

 plants, natural distribution of forest trees, etc. 



The zoology branch is concerned with zoological researches as far as 

 they concern forests, and with control methods. 



Physical-chemistry branch has to do wnth the chemistry of soils, 

 humus formation, hard-pan formation, etc. 



