8 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



three years old they showed the average heights stated in the 

 Table. When seed was taken from trees situated at elevations 

 ranging up to 3600 feet, the resulting plants showed but little 

 difference in size, the advantage being rather in favour of the 

 higher-grown seed. But in the case of seed produced above 

 5000 feet, the plants were distinctly shorter, agreeing in this 

 respect with the results obtained with spruce and larch. When 

 the dates of coming into leaf are examined, it is seen that plants 

 from high-grown seed are somewhat later than the others, 

 whereas they show a tendency to stop growing sooner, and they 

 certainly shed their leaves earlier. 



Table V. 



S7i'iss Experime7its with Sycamore {Crop 1900) 

 in Nursery at Adlisberg {2200 feet). 



As previously stated, it would be most unsafe to apply these 

 Austrian and Swiss results to the conditions prevailing in 

 Scotland; but in the countries referred to there is no doubt 

 that where plantations of spruce and larch are being formed 

 at low or moderate altitudes, care should be taken to secure 

 seed from similar localities. In the experimental plantations 

 near Vienna, one finds that an area stocked with plants from 

 low-grown seed is in close canopy with all ground-herbage 

 suppressed, when on an adjoining area the young trees, raised 

 from high-grown seed, are far from touching each other. It is 

 perfectly evident that in the one case the profits of forestry will 



