Periodical Literature 345 



Schiipfer, pointing out that the German 



Value spruce is the best money producer, while 



Production fir beats it in volume production, makes a 



of Spruce comparative calculation for the two species 



and Fir on the basis of sample areas, to find out 



whether the tendency to favor the spruce 



against the fir is justified. 



In a 130-year-old spruce stand, with trees 8 to 32 inch diameter, 

 the average sample tree had 19 inches with 109 feet height. From 

 volume tables for spruce and fir the contents of the group of 

 trees for the latter species showed 9.2 per cent greater volume. 

 The form quotient for the sample tree of spruce was .68, for fir 

 .71 (more full bodied). A subdivision into assortments made the 

 first-class logs for fir nearly 4 per cent more. Loss in logging 

 (over volume table contents) for spruce 11.4 per cent, for fir 

 12.7 per cent (larger bark per cent) ; in practice, these figures 

 might increase to 13 and 14 per cent respectively. Taking log 

 prices for spruce of various grades and averaging, the quality 

 figure is 21.77 mk; with the same prices, the fir would work out 

 21,78 mk, but on the whole harvest the quality figure for fir could 

 be 6 per cent lower in order, multiplied with the volume, to yield 

 the same as spruce. 



Considering, however, that the fir being the most tolerant 

 species can support a stand denser, produces a larger basal area, 

 and during the period of regeneration, acquires a considerable in- 

 cement on the nurse trees, has less enemies, regenerates readily, 

 it may be assumed that it can compensate for a 10 per cent reduc- 

 tion in volume-value difiference on sites that are suitable. 



Zur Massen- und Wertserzeugung von Fichte und Tanne. Forstwissenschaf t- 

 Hches Centralblatt, December, 1915, pp. 537-42. 



Watson reviews at some length the 



Working Plans inaccuracies of past working plans. The 



in Burma main trouble has been that too small a 



percentage of the growing stock was 



measured and then only trees of the more important species 



above a certain size. The result was too much theorizing based 



on highly inadequate data. He states : 



