28 



EEFORESTATION ON THE NATIONAL FORESTS. 



from a storage period of one year only, it would seem that prefer- 

 ence should be given to storage points in the dry eastern Rocky 

 Mountain region, and that the Middle West should be avoided. 



One set of experiments, in which the seed was stored in Washington 

 only, was begun in 1906. With a single exception of one sealed jar, 

 all the seed was stored in cloth bags, since the object of the experi- 

 ment was primarily to determine the effect of temperature upon the 

 stored seed. Pinus torreyana, Pinus divaricata, Abies concolor, and 

 Pseudotsuga taxifolia were the species used. The seed were stored 

 under the following conditions: 



(1) Office shelf, seed laboratory, temperature never below 32 F. 



(2) Unheated room in seed store, in which temperature follows 

 natural changes. 



(3) Seed laboratory, in sealed jars, temperature never below 32 F. 



(4) Chill room, storage warehouse, temperature 6 to 10 F. 

 Tests made on the seed during the winter of 1909-10 gave the 



results shown in Table 9. 



TABLE 9. Germination per cent of seed stored under different temperatures, 



Washington, D. C. 



Although these tests are rather meager ones upon which to base 

 conclusions, the results at least indicate that more attention might 

 profitably be given to storing seed at low temperature. 



