No. 1, August, 1921] FORESTRY 33 



200. Thkbeljaiir. Kiefem-Dauerwaldwirtschaft. [Continuous method of handling 

 Scotch pine.] Zeitschr. Forst- u. Jagdw. 52: 2S9-29G. 1920. — A critical discussion of the posi- 

 tion taken by Oberforstmeister Moller in recommending the natural regeneration of Scotch 

 pine by a method which he terms continuous forest management. — Joseph S. Illick. 



207. Vanselow. Von der Spessarteiche. [The Spessart oak.] T'orstwiss. Centralbl. 

 42: 345-353. 1920.— The Spessart oak is the most valuable product of German forestry. 

 Its wood is in great demand for furniture and brings extremely high prices,— ^95(10 marks per 

 cubic meter in 1920 for 1st class material, and 0995 marks per cubic meter for all grades, as 

 compared with 82 marks in 1901. Being grown on a rotation of from 200 to almost 500 years, 

 the trees are exceptionally large and straight, with boles clear of branches for 20 to 25 meters 

 and with a diameter of from 2 to 4 feet. The oak is usually started in pure stands, and under- 

 planted with beech after it is about 100 years old. Another method is to start both oak and 

 beech at the same time. Each method has certain advantages and disadvantages, but both 

 have shown that beech is absolutely essential for the best development of the oak when grown 

 on such long rotations. Silvicultural treatment of the stands is discussed in some detail. — 

 W. N. Sparhawk. 



208. Vater. Der Kalkgehalt des Bodens und die Buche. [Lime content of soil and 

 beech.] Tharander Forst. Jahrb. 71: 319-329. 1920. — Beech requires more lime than fir, 

 spruce, or pine. Schroder found that a pure stand of beech on an average site requires 

 annually 41.7 kg. per acre, while fir requires only 33.5, spruce 28.4, and pine lO.G kg. Only a 

 portion of the lime absorbed goes into the wood; most of it goes into the leaves and with their 

 fall and decomposition again becomes available. Of all the principal European forest trees 

 the beech most completely checks the leaching out of the soil. It is a protector of the soil, 

 and lime will stimulate its growth. — Joseph S. Illick. 



209. Whitford, H.N. The Patagonian forests. [Rev. of : Rothkugel, Max. Los Bosques 

 Patagonicos. Buenos Aires, 1916.] Geog. Hev. 11: 141. 1921. 



210. WiLBRAND, R. Wald und Rente. [The forest and income.] Allg. Forst- u. Jagd- 

 zeitg. 95: 197-200. 1919.- — A discussion of the real goal of municipal forests, and a technical 

 discussion of various forms of forest management and forest income. Financial considera- 

 tion must not overshadow other important and essential factors. The city of Diisseldorf 

 bought from the state of Prussia a tract of forest land, for which 2,000 marks per acre were 

 paid for the soil alone and an additional amount for the growing stock. It is estimated that 

 the best financial return that can be hoped for is about 0.75 per cent on the capital invested. 

 The city of Giessen in Hessen bought city forest land for 1184 marks per acre, of which only 

 230 marks was figured for the soil value. In spite of the high price paid for the land, the pur- 

 chases are justified fully by the indirect benefits, which the author believes should be given 

 greater weight than the financial consideration. In an appended short review Dr. Wimmen- 

 auer concurs with most of the author's conclusions. — Joseph S. Illick. 



211. WiLBRAND. Waldrechnung und Weltrechnung. [Forest finance and world finance.) 

 Zeitschr. Forst- u. Jagdw. 52: 337-342. 1920. — A general discussion of the influence of the 

 rate of exchange, rise in price, and other economic factors on forest finance and general world 

 finance. The article shows the effect of compound interest calculations in normal times 

 and compares the period of the war and since the war with pre-war prices and conditions. — 

 Joseph S. Illick. 



212. Wimmer. [Rev. of: Rubner, Konrad. Die Bewegung der Holzpreise in Deutsch- 

 land vom Begihn des Weltholzhandels bis zum Welt-Krieg. (Movement of timber prices in 

 Germany.) Neudamm, 1920.] Forstwiss. Centralbl. 42: 453-456. 1920. — A very compre- 

 hensive and detailed study, with diagrams and tables, of timber prices in all of the German 

 states for which such figures are available for the period 1875-1914. Economic laws governing 

 the formation of timber prices are discussed, and the relation between such prices and the 

 general economic situation is shown.^TI'. N. Sparhawk. 



BOTANICAL ABSTRACTS, VOL. IX, NO. 1 



