6 FORESTEY [BoT. Absts., Vol. X, 



FORESTRY 



Raphael Zon, Editor 



(See also in this issue Entries 30, 150, 215, 329) 



37. Anoxtmous. British Empire timbers. Australian Forest. Jour. 3: 86-87. 1920; 

 4: 18-19, 56-58, 86-87, 146-148. 1921.— The article gives a very brief statement of forest 

 conditions in Bermuda, British Guiana, Cyprus, Gold Coast Colony, South Africa, Southern 

 Rhodesia, British India, British East Africa, Nyasaland and Uganda, the Bahamas, the 

 Malay Peninsula, and brief notes on the leading commercial species and forest products of 

 each dominion. — C. F. Korstian. 



38. Anonymous. Diseases of trees. Australian Forest. Jour. 4: 53-54. 1921. — The 

 note directs attention to the need for investigating forest-tree diseases. — C. F. Korstian. 



39. Anonymous. Education of forest apprentices. Australian Forest. Jour. 4: 52. 

 1921. — A note is presented on the training of lower-grade forest ofiBcers of the Western Aus- 

 tralia Forest Department. — C. F. Korstian. 



40. Anonymous. Fire-resisting properties of eucalypt timbers. Australian Forest. 

 Jour. 4: 55-56. 1921. — The note stresses the fire-resistant qualities of eucalypt structural 

 timbers. — C. F. Korstian. 



41. Anonymous. Poisoning green timber. Australian Forest. Jour. 4: 108-109. 1921. — 

 Girdling and the killing of trees with arsenic are discussed. — C. F. Korstian. 



42. Anonymous. Ueber Brennkraft und Heizwert der verschiedenen Holzer. [The 

 heating value of various woods.] Wiener. Allg. Forst- u. Jagdzeitg. 38: 215. 1920. — Heating 

 value depends upon specific gravity and resin content. A listing of woods from "Der Holz- 

 markt" is given, including 11 species ranging from maple with a value of 1011 to willow with 

 508 (relative values for equal volumes, based on hornbeam = 1000). A list by Pressler is 

 given, including 16 species ranging from 104 for maple to 53 for willow (based on red beech 

 = 100). A list by Tuchschmied (8 species air dry) runs from 2427 heat units per cubic deci- 

 meter for hornbeam to 1698 for fir, and per kilogram from 3571 for pine to 3070 for ash. A 

 list of 12 species by Tuchschmied having equal moisture contents runs from 103 for hornbeam 

 to 68 for linden (based on beech = 100). The species included in one or more lists are Car- 

 pinusbetulus, Fagus silvatica, Acer spp., Quercus spp., Fraxinus excelsior, Betula alba, Pinus 

 sylvestris, P. austriaca, Picea excelsa, Alnus spp., Populus sp., P. tremula, Salix spp., Ulmus 

 campestris, Abies pectinata, Larix europaea, and Tilia sp. — F. S. Baker. 



43. Anonymous. Forestry in the United States. [Rev. of: (1) Ise, J. The United States 

 forest policy. 395 p. Yale Univ. Press: New Haven; Humphrey Milford: London, 1920. 

 (2) Recknagel, a. B., and J. Bentley, Jr. Forest management, xiii -f 269 p., S pi. 

 John Wiley and Sons: New York; Chapman and Hall: London, 1919. (3) Brown, N. C. 

 Forest products; their manufacture and use. xix + 471 p. John Wilej' and Sons: New York; 

 Chapman and Hall: London, 1919.] Nature 107: 326-327. 1921.— The 1st and 3rd are 

 regarded as good; the 2nd is not elementary enough for private owners and managers. — 

 0. A. Stevens. 



44. Archer, Erling. Om tommerets form i Glommens og Drammens vasdrag. [Form 

 of timber in Glommen and Drammen watersheds, Norway.] Bilag Tidsskr. Skogbruk 

 28^/1": 57-122. 1920. — Results are presented of an investigation of the form of the timber of 

 Scotch pine and Norway spruce in the 2 principal lumbering regions in Norway, by the 

 Norwegian Forest Experiment Station. The dimensions of logs for different parts of the tree, 

 the method of obtaining the measurements, the construction of the graphs and tables, and the 

 volume tables for logs of different lengths and top diameter in cubic contents are given. — 

 /. A. Larsen. 



