402 Forestry Quarterly 



Only a translation would do justice to the expositions of Mar- 

 tin. We can therefore only call attention to these most valuable 

 contributions to the literature. 



Die okonomischen Aufgaben der Forstwirtschaft mil besonderer Beriick- 

 sichtigung der preussischen Staatsforsten. Tharandter Forstliches Jahrbuch, 

 volumes 65 and 66, 1914 and 1915. 



UTILIZATION, MARKET AND TECHNOLOGY 



In green wood the conditions for rusting 

 Wood iron are given, namely moisture and salts, 



and chlorides, phosphates, and acids which ac- 



Iron celerate the rusting. Electric reactions are 



also influential. There are, however, cer- 

 tain Australian woods which are not liable to rust iron in contact 

 with them. Among these are Afzelia byuga, Flindersia australis 

 (Moa), Eucalyptus microcorus (Tallow wood), Eucalyptus mar- 

 ginata (Jarrah), and Eucalyptus pilularis (Blackbutt), which Dr. 

 Rohland has investigated. The first two were the most rust re- 

 sisting. Such woods are specially valuable in industries which 

 need vessels that must resist attacks by acids, such as the color 

 vats in spinning mills, the fermenting vats in breweries, the vats 

 for aniline color and other color manufacture, in underground 

 use, etc. 



Probably the same cause which prevents the rusting of iron in 

 re-enforced concrete explains the behavior of these woods. In the 

 concrete a calciumhydroxid is formed when the iron is being im- 

 bedded, which protects the iron against rusting. In wood, pos- 

 sibly potash or other organic compounds which contain hydroxyl- 

 ions and hence react alkaline may be the protecting agent, the 

 close structure of the wood being also favorable. 



Das Verhalten des Holzes gegen Risen. Forstwissenschaftliches Central- 

 blatt, March, 1915, pp. 109-112. 



STATISTICS AND HISTORY 



The Russian Government published early 

 Russian in 1914 a full statement in French of 



Forest Resources its forest resources, its main purpose be- 

 and Policy ing, according to the Germans, to pre- 



sent evidence of its assets in order to in- 

 duce the French to loan money for war preparations. Be that as 



