June, 1920] FORESTRY 301 



2054. Schadelin, W. Wirtschaftliche Zuchtwahl? (Practical selection.] Schweiz. 

 Zeitschr. Forstwcscn 70: 101-103. 1919. — The author discusses the questions whether selec- 

 tion should be based on simply selecting the best of the present stand or whether the stand 

 should be improved by breeding and selection. In order to apply selection intelligently 



the characters of the parent tree must always be considered. In this connection any seed 

 study must take into account both the staminate and pistillate tree. This, naturally, in- 

 volves a long term study extending through several generations of the trees to be taken as a 

 basis. In improving a forest by selection it is always desirable to choose trees which have 

 been in a given locality for several generations. By using trees of this class which are desir- 

 able the characters are more nearly perpetuated than by the introduction of foreign char- 

 acters into a different locality. In regions where the natural forests have been perpetu- 

 ated for several generations and the characters have become fixed to a large extent, clear 

 cutting methods have destroyed the forests completely and have been replaced by artificial 

 methods and plants of foreign characters have been introduced. The author points out that 

 different qualities of different species, such as the twisted grain of the spruce, the crenate struc- 

 ture of the wood, liability to frost and other factors which apply more or less to hard woods 

 and conifers, must all be taken into consideration in developing the forest. Seed studies 

 have not gone into sufficient scientific detail to give definite data on these characteristics. 

 The author takes exception to Professor Engler's work on seed studies because in these 

 studies only the staminate parent tree was considered. He contends that the weather influ- 

 ence on the seed extends through two seasons, usually the season of flowering and the season 

 of maturity. These factors as well as all environmental factors must be considered. In 

 conclusion he states that selection must either be done to improve the next stand or selec- 

 tion breeding undertaken to improve and fix the improved characters in the future stand. — 

 — /. V. Hofmann. 



2055. Sibbern, Georg. Fra en reise i Frankrike. [From a trip to France.] Tidsskr. 

 Skogbruk 27: 191-199. 4 pi. 1919.— The author describes briefly several natural and planted 

 forests in France and the tract in the war-zone to be reforested by the Norwegian Government 

 in greater detail. — /. A. Larsen. 



2056. Siecke, E. O. Texas forest facts. 16 p. Office of State Forester: College Station, 

 Texas. 1918. — The pamphlet is devoted to forest statistics for Texas. The present annual 

 returns from the farm woodlands of the state amount to $12,000,000. There is included an 

 interesting table giving the ratio of forest area to forest appropriation in 14 representative 

 states. There follows a discussion of the activities of the State Forester and possibilities for 

 development. — James B. Berry. 



2057. Skvortzow', B. W. Notes on the agriculture, botany and zoology of China. Jour. 

 Roy. Asiatic Soc. North-China Branch 50: 49-107. PI. 1-2, fig. 1-11. 1919— See Bot. Absts. 

 3, Entry 2462. 



205S. Sterling, E. A. Mandatory control opposed. Amer. Forestry 25: 1339-1340. 

 1919. — (A contribution to the general topic "A national forest policy.") It is the opinion of 

 the writer that under the existing political and economic situation a policy aimed at the 

 mandatory acquirement. of private lands will fail: (1) because the public has not been con- 

 vinced that it is necessary; and (2) for the reason that sufficiently strong opposition would 

 immediately develop to not only defeat such a policy, but to jeopardize any forest policy. — 

 Chan. H. Otis. 



2059. Thelen, Rolf. Aerial photography and national forest mapping. Jour . Forestry 

 17: 515-522. 1 pi. 1919. — The xise of the airplane in forest administration and mapping is 

 described, and its limitations are set forth in detail for various forest activities. — E. A T . 

 Xfunns. 



