92 forestry Qimrterly. 



tains, the Doi Sutaep, altitude 5500 feet, and Richthofenpeak, 

 8,350 feet, in which the various forest types from the tropical 

 to the temperate zone are passed. In the first case. Teak and 

 Albizzia, the former the main commercial timber, form the im- 

 portant forest of the lower levels, mainly on south and west 

 exposures, to be followed on the other exposures by what the 

 author terms the Dipterocarp-hill forest, formed mainly of 

 Dipierocarpiis laevis and turhinaUis, which is bled for its oil. 

 At about 2,000 feet a new type is entered, characterized by 

 lianas' and other climbers, absent in the former type. Here a 

 Salix, a Juglandacea ( Bnglehardtia spicataj, Thunbergia, etc., 

 are found. At 2,500 feet a mixed oak forest is entered [Quercus 

 LindleyafW; lineata, Jimghuhnii, oidocarpa (deciduous), with 

 chestnut (Castanopsis indica), a variety of leguminose trees, and 

 the Magnoliacean Michelia Champaca, with many others. At 

 about 3500 feet, pine forest appears (Piniis Khasya) of excel- 

 lent development, which becomes pure. At 4500 feet the pine 

 is replaced by a dense evergreen forest of oak (Quercus incana 

 and JungJnihnii) with some other species; and at about 5.000 feet 

 the only known ( ?) Asiatic species of Prunus, Hosscusii appears. 

 Above this, Theaceae, Ericaceae, Euphorbiaceae, Myrtaceae and 

 Quercus species form an inferior growth, which on south ex- 

 posures reaches hardly over 25 feet, interspersed with grasslands, 

 which the author refers to as result of fires. For the explorer 

 in tropical lands many valuable suggestions are given. 



The illustrations are not always of the best : a map showing 

 the location of the most valuable teak forests shows that North- 

 ern Siam has perhaps the most extensive forests of this species. 



B. E. F. 



OTHER CURRENT LITERATURE. 



An Economic Study of Acacias. By C. H. Shinn. Bulletin 

 of U. S. Department of Agriculture, No. 9. Washington. D. C. 

 191 3. Pp. 38. 



Discusses characteristics of various species, history of Acacia 

 culture in California, and economic uses. 



