S44 t:XPE]RIMENT STATION RECORD. [Vol. 41 



Vacation days in Colorado's National Forests (U. S. Dept. Agr., Forest 

 Sen-., 1919, pp. 60, figs. 24)- — A poijular document describing tlie recreational 

 features of the National Forests of Colorado, and giving information to camp- 

 ers relative to fire prevention and camp sanitation, camping outfits, rations, etc. 



Vacation trips in the Cochetopa National Forest ( U. S. Dept. Agr., Forest 

 Serv., 1919, pp. l-'i, pi. 1, figs. 6). — A popular document dealing specifically with 

 the recreational IVatures (»f the CoclH^opa National Forest of Colorado. 



The Ouray Mountains of the ITncompahgre National Forest ( U. S. Dept. 

 Agr., Forest Serv., 1919, pp. 14, pl- 1, figs. 6). — A document similar to the above, 

 dealing with the Ouray IMountains of the Uncompahgre National Forest in 

 Colorado. 



A vacation land of lakes and woods. — The Superior National Forest ( U. S. 

 Dept. Agr., Forest Serv., 1919, pp. 12, pl. 1, figs. 6). — A document similar to the 

 above, dealing with the Superior National Forest in northern IMinnesota. 



A historical review of the Bergius arboretum for the period 1885—1914, 

 R. E. Fries {Acta Horti Bergiani [Stockliolm], 6 (1918), No. 1, pp. 5-24, P'«- 

 108). — A progress report on activities at the arboretum of the Royal Swedish 

 Scientific Academy at Stockholm. The report is accompanied by maps and 

 numerous illustrations of the arboretum. 



Storied or tier-like structure of certain dicotyledonous ■woods, S. J. Record 

 {Bui. Torrey Bot. Club, 46 {1919), No. 7, pp. 253-273). — A contribution from the 

 Yale School of Forestry. 



The author's studies show that storied or tier-like arrangement of part or 

 all of the elements is characteristic of many dicotyledonous woods representing 

 a wide range of natural orders and families. The storied structure is found 

 also in the secondary phloem. It is exhibited on longitudinal sections, typically 

 the tangential, as fine transverse striations " ripple marks." " Ripple marks " 

 were constant enough in stems of considerable thickness to serve as a valuable 

 diagnostic feature. In some woods pit areas on the fibers were in seriation and 

 the cells of the wood parenchyma strands are arranged in a secondary seriation, 

 visible xmder the lens. 



A table is appended giving for each wood the various elements storied, the 

 uniformity and distinctness of the markings, and the height of the tiers. A list 

 of cited literature is also included. 



Studies of regeneration conditions in Norrland pine forests, II, H. Hessel- 

 MAN {Meddel. Stut. Skogsforsoksanst., No. 13-14 {1916-11), pt. 2, pp. 1221-1286, 

 CXLIX-CLXVII, figs. 16). — In a previous study ^ of regeneration in the pine 

 forests of Norrland the results of which are here briefly sunnnarized, the author 

 concluded that the real cause of unsatisfactory regeneration in open lands ad- 

 joining the forests must be attributed to the unfavorable nature of the humus 

 cover. The studies here reported at length were taken up from that point of 

 view. The work is presented under the general headings of exterior hindrances 

 to plant development, the growth of pine seedlings upon various parts of a 

 forest, chemical analysis of the soils of pine forests, the nature and properties 

 of the hunuis cover in various parts of a pine forest, cultural experiments, the 

 cause of slow and unsatisfactory germination in the pine forests, and the man- 

 agement of i)ine forests on the basis of the evidence obtained in the studies. 



The arborescent indigenous legumes of Hawaii, .T. F. Rock {Bd. Agr. and 

 Forestry Haicaii, Div. Forestry Bot. Bui. 5 {1919). pp. 53, figs. 18).— In this 

 paper the author lias brought together the botanical information concerning the 

 few endemic arborescent species of the family Leguminoste found In the 



» Meddel. Slat. Skogsforsoksanst. (Mitt. Foi-stl. Wers. Aust. Scliwedens), 1910, No. 7. 



