55 



In January 1907, 5 acorn samples each of 100 of the largest and 

 best developed individuals were selected. The samples were mixed 

 with moist turf mould, placed in boxes and stored in an open shed 

 with a roof in my garden. There they remained undisturbed until 

 the sowing took place in 5th May in a shady situation along the 

 north side of some large trees. The soil was moist and cold, deep 

 humus on loam. The summer was cold and rainy. The result was 

 as follows: 



7 sprouts 



20. May 



Largest Danish unger- 



minated acorns. 100 



weighed 585 gr. 

 Largest Danish unger- 



minated acorns. 100 



weighed 585 gr. 

 Largest Dutch. The 



rootlet just broken 



out of the shell. 100 



weighed 560 gr. 

 Largest Dutch ungerm- 



inated. 100 weighed 25 sprouts 



585 gr. 

 Largest Dutch with 5-10 



cm long black, dried- 

 out autumn rootlets, 



which were cut off to 32 sprouts 



1-2 cm long just before 



sowing. 100 weighed 



585 gr. 



20. June 



2 sprouts 



25 sprouts 

 37 plants 



9 sprouts 

 42 plants 



10 sprouts 



68 strong 



plants 



20. July 29. Sept. 



19 plants 

 27 plants 



69 plants 75 plants 



14 sprouts 

 56 plants 



80 plants 



88 plants 96 plants 



By sprout I mean the young tender, generally red shoot which 

 is visible before the leaves develop, in distinction to the later plants 

 bearing leaves. The Danish acorns gave no more plants than noted 

 under 20. Sept., none also in the next summer. 



In the same spring in which this small experiment took place 

 I sent to two forest districts in Jutland, each a shipment of acorns 

 of exactly the same lot. In one place the sowing was a complete 

 failure on account of the cold and wet of the summer, whilst in 



