236 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



Both pine and spruce afforestations on waste lands frequently 

 escape the disease where the natural water-level is not more 

 than 3 to 4 feet from the surface, but in these cases they show 

 a very characteristic root formation, entirely different from the 

 usual development of their root-system. They send down a 

 number of separate bunches of roots to the water-level. 



Two plates are annexed. The upper figure in Plate III. represents a 

 healthy Douglas fir, growing on an inferior soil in the midst of a pest-stricken 

 pine forest fifty-five years old ; the Douglas is only thirty years of age, but 

 already measures 40 centimetres diameter at breast-height. 

 In the lower figure — 

 {a) Represents the root-system, with the tap-root cut off, of a healthy 

 Douglas fir, thirty years old, growing in the same locality. The 

 roots were in actual contact with diseased pine roots. 

 {6) Represents the roots of a diseased pine fifty-five years old, grown in 

 the immediate vicinity of the Douglas. 

 On Plate IV., {c) Shows the peculiar development of the roots of a healthy 

 Scots pine, grown on old fields, but with a natural water-level of 3^ 

 feet below the surface. 

 {d) Exhibits the peculiar formation of the root-system which the silver 

 fir assumes on heather lands. 



( T/ie German Notes will be concluded in the January issue. ) 



ERRATA. 



Continental Notes — France. 



By a. G. Hobart-IIampden, p. 46. 



On p. 47, line 11, for "value" read "volume.'' 



On p. 51, line 7 from bottom, /?;■ "silviculture" read "silvicultural." 

 On p. S3, line 16, for "Thuya" 7rad "Tsuga." 

 On p. 23, line 20, for " 11° Fahrenheit" read "—11° Fahrenheit." 

 On p. 55, lines 3 and 4,/^;' " of extreme durability . . . stag-headed " read 

 "the trees continue to grow to a great age, even though stag-headed." 



