SEED EXPERIMENTS WITH PINUS SYLVESTRIS. 



169 



were uniform in quality of soil and situation, while all received 

 precisely similar treatment throughout. 



The following table gives particulars regarding the source of 

 the several lots : — 



The approximate ages of the trees from which the seed was 

 taken are as follows : — 



Plot I, . . . . . .112 years. 



2, 

 3. 

 4, 

 5> 

 6, 

 7, 



80 

 . 120 

 . 40 

 . 100 

 120-140 

 . 120 



100-140 ,, 



In sowing the seeds at Bangor, Spitzenberg's Drill-maker was 

 used, double drills being made 2 inches apart with 4 inches 

 between each pair of drills, and the seeds were covered witli 

 soil to a depth of half an inch. Care was taken to distribute 

 the seed as evenly as possible, but, as the following table shows, 

 the weight varied slightly — partly owing to differences in the size 

 of the seed. Exactly the same space was allotted to each plot, 

 with the exception of No. 8, of which only a very small quantity 

 of seeds (5 grams = -160 oz.) was received ; in this case only one 

 double drill was sown. On the other plots the following 

 quantities of seed were sown : — 



VOL. XXIII. PART II. M 



