248 TRANSACTIONS OF ROYAL SCOTTISH ARRORICITLTURAL SOCIETY. 



marked off a second area of one-tenth of an acre, and like-wise 

 estimated the value of every tree upon it. He proceeded in 

 this manner throughout the whole of the three days ; and, adopt- 

 ing the measured plots as sample areas, he calculated from them 

 the money value of the stock standing on the various blocks of 

 the forest and on the whole property. 



He has since been able to check the correctness of a portion of 

 his work, and the following figures may be taken as fairly repre- 

 senting the degree of accuracy he attained. A block called Les 

 Loches was estimated to carry stock worth £11,960. Having 

 cut and sold timber from this block to the net value of =£8400, 

 he carefully measured what was left, and found it worth =£3960. 

 These two values added together amount to £12,360, only £400, 

 or 3£ per cent., in excess of his valuation. On the whole, so far 

 as he has data for forming an opinion, Dr Schlich believes that 

 his other estimates will turn out to be from 4 to 5 per cent, 

 below the actual values, and will thus leave a suitable margin 

 to meet unforeseen contingencies. Considering the very irregular 

 nature of the crop, which changed in character every few yards, 

 the results attained by his rapid survey are truly astonishing. 

 They testify in a remarkable manner to his experience and skill 

 in estimating. 



