82 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY 



What is of equal importance is to see that all the experience 

 that is gained is not only made available to all but used by all. 

 For instance, what is the use of determining that Sitka spruce 

 is the best species on certain peats, if we continue planting 

 Scots pine there? Research should not only 'be encouraged 

 within the industry; it should be regarded as essential to its 

 continued progress. 



8. A Note on the Financial Results of Pine and 

 Beech Forests in Normandy. 



By A. D. Hopkinson. 



While serving on the staff of the Directorate of Forestry, 

 the writer came into close contact with the French Forest 

 Service in northern France, and it was through the courtesy 

 of certain of the French forest officials that he was enabled 

 to obtain the information on which the present article 

 is based. 



The object of the article is to illustrate the difference between 

 the material and financial yield of a conifer grown on a medium 

 rotation and a deciduous hardwood grown on a long rotation. 

 As the value of both timber and money at the present period is 

 in a very fluctuating condition, it was deemed best to base the 

 comparison on both pre-war prices of timber and pre-war rate 

 of interest, especially as the object in view is not to demonstrate 

 the actual yield of either species so much as to compare the two. 

 To us in this country who are about to embark on fairly exten- 

 sive schemes of planting, the actual yields of certain species 

 grown upon the Continent is probably not so interesting as the 

 relation of the yield of one to the yield of another, because, 

 although the actual yields would probably differ from our results, 

 the proportion existing between the two might be expected to 

 remain fairly constant. 



Of the final yield of the two trees under discussion — Scots pine 

 and beech — when grown in pure high-forest, we have certain 

 knowledge in this country, but in regard to the intermediate 

 yield or product of thinnings we have but little data, whereas 

 in the State forests, from which the writer obtained the informa- 

 tion on which this article is based, accurate records of both final 



