26 



and the smallest seed weight for Mountain Pine I ever obtained, 

 confirm this supposition. I am in hopes of obtaining some more 

 cones from the Riesengebirge, and it is intended to place the plants 

 raised from the two consignments in places in Danmark where 

 they will be protected from pollination by other Mountain Pines, 

 so that in time greater quantities of genuine cones may be avail- 

 able. Cone years occur very seldom in the Riesengebirge. It will 

 probably be of great advantage to use as a nurse for the spruce, 

 a form of Mountain Pine that never grows high, and, consequently, 

 does not need to be repeatedly cut back in its youth, to prevent 

 the spruce suffering from its shade. 



The seed of the ROUMELIAN STROBUS PINUS PEUKE 

 germinates very slowly and needs a wearisome treatment: 



Germination after 150 200 300 350400 days 



190809 new seed 8 35 38 (+38) 



190910 the same lot ... 85 (+4) 



191011 new seed 89 



Obviously the Seed-testing Establishment cannot continue ger- 

 mination tests that last so long; these isolated experiments were 

 only undertaken to show that the seed should be prepared strati- 

 fied in the nursery for a year before sowing, else it will lie over 

 a year in the seed beds before growing. 



THE SCOTS PINE PINUS SILVESTRIS. If the examination 

 of the different forms is included, the figures in the tables show 

 the results of 99 tests. 



Considering first the germination results, it is obvious that the 

 West Norwegian pine seed from "Bergens Skogselskab" with a 

 mean real value of 91.1 and a germinating energy of 83 % in 6 

 days, takes first place. Next comes the Swedish seed with a 

 mean real value of 89.6 and the highest found real value 98.5 (97.5 



+ !)* 



In 1905 06 West Norwegian seed germinated in 6 days 83 %, 

 10 days 92 %, 20 days 93 %, 30 days 93 (-f 2) %; and the poorest 

 result was shown, in 1889 90, by Finland seed: 10 days 9 %, 

 30 days 15 %. 



* "Real value" means the number of pure and germinating- seeds in 100. Thus, if a sample showed 



80 X 90 

 a percentage of germination 90, and percentage of purity 80, the real value would be = 72; in other 



words, each 100 Ibs of seed contain 72 Ibs that are both pure and capable of germinating-. 



