22 FORESTRY . |BoT. Absts., Vol. VIII, 



170. Johnson, F. R. Forests in the sand hills. Amer. Forestry 26: 582-584. 4 fig. 1920. 

 — One of the first forest plantations in western Nebraska was established in 1891. Jack, 

 Scotch and yellow pine were used, with good results. In 1903 a plantation was estab- 

 lished with jack pine seedlings from the forests of Minnesota. These trees are now 20-25 

 feet in height and forest conditions prevail. Nurseries with a large annual output have 

 been established. Western yellow pine (Pinus ponderosa) and jack pine {Pinus divaricata) 

 are best adapted to this region. Three-year old transplants are used and planted in furrows. 

 Method of planting and special tools used including the "trencher," are discussed. Fire 

 protection has been very effective, fire lines a rod wide dividing the plantations into units 

 of about 160 acres. — Chas. H. Otis. 



171. JuDD, C. S. The first algaroba tree in Hawaii. Amer. Forestry 26: 605-606. 2 fig. 

 1920. — The characteristics and uses of Prosopis juliflora DC. are discussed. — Chas. H. Otis. 



172. Kratjch, Hermann. The use of stand graphs in determining the limitation of cut. 

 Jour. Forestry 18:719-722. 1 fig. 1920. — To properly mark a stand for cutting rate of 

 growth and volume on the ground should be known, but unless the marker keeps a record of 

 the cut and what remains, there is no way to determine the amount left on the ground. A 

 method of determining the safe diameter limit and how much remains on the ground is 

 described. Charts show the per cent of trees of each diameter class on a sample plot and the 

 per cent of the volume in each of these classes for each species. When the final stand is 

 decided upon, by using these percentages, the volume to be cut may be arrived at by cutting 

 each species to a diameter limit. — E. N. Munns. 



173. Lagerberg, Torsten. Snobrot't och topprota has granen. [Snow breakage and top 

 rot in spruce.] Meddel. Statens Skogsforsoksanst. 16: 115-162. Fig. 1-11. 1919.— Working 

 plans are often seriously disrupted by snow damage. The calculated annual yield may be 

 greatly increased by the salvaging of fallen or badly injured trees. Even uninjured trees 

 must sometimes be cut in order to save them from windfall or drought. Until recently it has 

 been a difficult problem to decide what character and degree of damage is permissible in 

 trees which are left. The present investigation shows that broken stems are almost invari- 

 ably attacked by rot, and therefore should be removed from the stand. The rot progresses 

 more rapidly in rapidly growing than in slow growing trees. Callus and exudations from the 

 wound may delay and in rare cases prevent infection. — G. A. Pearson. 



174. Lane-Poole, C. E. Report of the Forests Department for the year ended 30th June, 

 1920. Ann. Progress Rept. Forests Dept. Western Australia. 30 p. Perth, 1920.— The work 

 of the Department for the fiscal period is briefly summarized under the following captions: 

 "Classification of forests, reservations, forest work, forest ranging and timber inspection, 

 plantations and nursery work, timber industry, kiln drying, firewood, mining timber, revenue 

 and expenditure, botanical, entomological, tan barks, commonwealth forest products lab- 

 oratory, sandalwood, kingia grass tree fiber industry, regulations, interstate forestry confer- 

 ence, publicity and staff." The total area classified to date amounts to 3,550,000 acres. A 

 start was made in the preparation of two preliminary working plans. Western Australia is 

 awakening to the possibilities of kiln drying. The overcutting of the sandalwood supplies 

 of the State is causing considerable concern. The organization of the Department was 

 delayed through the impossibility of obtaining the necessary staff. The report is appended 

 by detailed statements of revenue and expenditure; production of mill timber and lists of con- 

 cessions; leases; sawmill, hewing, firewood, sawmilling, and miscellaneous permits; herbarium 

 specimens collected and identified; trees grown and planted at the Hamel State Nursery; 

 forest insects in the departmental collection; and particulars of prosecutions during the year. 

 • — C. F. Korstian. 



175. Leavitt, Clyde. The British Empire forestry conference, 1920. Jour. Forestry 18: 

 669-675. 1920.— Foresters, from twenty-three countries in the British Empire met in July, 

 1920 and decided upon a definite plan of action. Some of the more important measures to be 



