458 JOURNAL OF FORESTRY 



the form o.f a com1)ination of higli thinning and low thinning; then come heavy 

 low thinnings and, if there is any undergrowth or it is possible to secure under- 

 growth, extra heavy low thinnings. 



By this means the wood is made more capable of resisting larch-canker. As 

 a preventive against canker, stripping the twenty to thirty-year-old trees of 

 branches should also be tried. The stripping should take place in dry weather, 

 and the brushwood should be removed or burnt up. 



The European larch can be cultivated with advantage as far north as central 

 Norrland, and should, by increased culture in the manner here indicated, con- 

 tribute to a very considerably increased yield on the part of the forests. 



Larch timber is of excellent quality, and' suitable for piles, house-building, for 

 power transmission and telephone posts, for sleepers and props. 



Owing to the durability of the timber for these purposes, twice the price 

 should be obtained for larch as for pine timber. 



Larix sibirica can be warmly recommended for culture in the northern and 

 central parts of Sweden, but preferably not south of north Vastergotland and 

 Ostergotland. In comparison with the larch from the Tyrol, it is distinguished 

 by a great percentage of straight stems. In this respect it is quite comparable 

 with the Scottish larch. As this larch is attacked by canker as much as the 

 Euorpean larch, and that, too, probably over the whole country, the same pre- 

 cautionary measures should be taken in its cultivation as for the European 

 larch — mixed woods on moderately good and poor ground and possibly strip- 

 ping of the lower branches. On quality grade 0.2 it is not worth while to culti- 

 vate this larch and on o.i it does not do at all. 



In the south of Sweden its growth is probably weaker than that of the Euro- 

 pean species, and it is there more attacked by canker than that. 



The timber is excellent and possibly still more durable than that of the Euro- 

 pean larch. 



Larix leptolepis is suitable for culture in the southern parts of Sweden as far 

 up as the vale of Malar (about 60° N. lat.). In its youth it attains very great 

 height and volume; but this probably abates somewhat earlier than with other 

 larches. As this species also is attacked by canker, it should also be employed 

 in mixture with other kinds of trees. It also bears somewhat more shade than 

 the other species of larch. On the other hand, it is troublesome in mixed woods 

 because of its bushiness. It can therefore scarcely be recommended except in 

 pure stands on the best ground, if it is desired to obtain a great yield in a short 

 time and then cut the stand early. It is also suitable as a preliminary culture. 

 The timber is stated not to be so valuable as that of the other larches. 



J. H. W. 



