522 



Forestry Quarterly. 



In an exhaustive report (also appearing as a 



Testing separate) from the Mycological Laboratory 



Pine at Eberswalde, comprising not less than 65 



Seed pages, Oberforster Haak discusses in detail 



the conditions and results of a series of most 



careful investigations to determine methods of testing Scotch Pine 



seed ; much of this presumably can be utilized for other species. 



He starts out with the statement that in former investigations 

 (see F. O., vol. V, pp. 204 ff.) it was proved that the actual use 

 value of pine seed increases and decreases in much more rapid 

 progression than the germination per cent, indicates. A similar 

 indication was worked out with spruce. In this latter experiment 

 the following results were recorded : 



I. Sandsoil. 



Seed 



Number Germination 

 per cent. 



2000 38 

 4000 68 

 8006 91 



Plant Per Cent. 

 Under Favorable Under Un favor - 

 Conditions able Conditions 



7 

 21 



55 



5 

 12 



26 



II. Loamsoil. 



10,000 

 30,000 

 10,000 

 40,000 



30 



75 

 80 



84 



14 

 42 

 48 



57 



The practical importance of this fact and the practical objection 

 that seed tests are notoriously uncertain, which the author flatly 

 negates, justify the careful investigation into the factors influenc- 

 ing germination tests and results. The Prussian and Wiirttem- 

 berg forest administrations insist upon making the germination 

 per cent, a basis for price. 



The long but highly interesting detail of the expose is di- 

 vided into seven sections, besides the summary. 



I. Influence of the season on the results of germination tests; 

 2. Influence of moisture; 3. Influence of temperature; 4. In- 



