No. 2, March, 1921] FOREST BOTANY AND FORESTRY 121 



should be planted to forest, and strips of trees should be placed on ridges and at places of 

 advantage in sheltering the meadows and the grazing animals. The development of forest 

 and meadow should go forward together for the greatest returns from the area. — J. V. 

 Hofmann. 



826. Trevor, C. G. Yield tables for single trees of deodar, kail, chil, spruce and silver fir. 

 Indian Forester 46: 439-451. 1920. — Results obtained through 20 years of work are given 

 in the form of tables for the above species. The data are compiled in cubic feet for diameter 

 and age groups and show that the current annual increment culminates around 120 years with 

 diameters of 20-24 inches. Spruce and silver fir have the highest values, with 3.60 per cent 

 at 105 to 115 years; and kail has the lowest, with 1.75 per cent at 75 years. Three site quali- 

 ties are recognized which are based on total height of the trees. — E. N. Munns. 



827. Unwin, a. N. African softwoods for pulp production. Nature 105:599. 1920.— 

 The following might be of use: Eriodendron anfractuoswn, E. orientate, Bombax huono'po- 

 zense, Triplochiton Johnsonii and T. nigericum (wood similar to spruce, fibers long, reproduc- 

 tion easy and growth rapid), Sterculi Barterii (growth very rapid), S. tragacantha, Terminalia 

 superba, Alstonia congensis, Ricinodendron Hendelotii, Pycanthus kombo, Musanga Smithii. 

 The baobab, Andansonia digitata, has been suggested as suitable, but is usually scattered and 

 remote from navigable waterways. — 0. A. Stevens. 



828. Watson, Russell. Summer planting of white pine on the Michigan state forests. 

 Jour. Forestry 18: 623-624. 1920. — Planting of P. strobus seedlings in Michigan was car- 

 ried on weekly from June to September, and the results appear to show that fall planting can 

 profitably be begun in August, and that the losses from summer planting were not as great 

 as might be expected. — E. N. Munns. 



829. Watt, A. S. On the causes of failure of natural regeneration in British oakwoods. 

 Jour. Ecol. 7: 173-203. 1919.— See Bot. Absts. 6, Entry 1501. 



830. Weidman, Robert H. A study of windfall loss of western yellow pine in selection 

 cuttings fifteen to thirty years old. Jour. Forestry 18: 616-622. 1920. — On government 

 sales of timber in Oregon, a heavy windfall loss is experienced in P. ponderosa stands the first 

 few years after cutting. The winds causing such loss are quite common in the region, and 

 fear of continued losses was felt. Observations on older cuttings of private operators who cut 

 their holdings in a manner similar to that practiced on timber sales, show that the heavy 

 losses, both in actual number and in volume, occur only in the first decades following the 

 opening in the stand, the decrease in numbers being more prominent than in volume because 

 of the large trees involved in the later windthrows, which, however, are not left under pres- 

 ent marking practice. The loss is that of the weakest trees and is heaviest in the early stage, 

 for after exposure the trees strengthen their root system. The study shows that the subse- 

 quent losses on sales should be slight. — E. N. Munns. 



831. Weiss, Howard F. Relation of research to forest management. Jour. Forestry 18: 

 590-597. 1920. — Attention of research workers in utilization and properties of woods might 

 better be concentrated on the species of rapid growth than on those of slow growth, even 

 though the slower-growing woods are at present of slightly higher value. Forest management 

 of the future will be intimately tied up with the relation existing between yields and the cost of 

 production, which invariably favors the faster-growing species. Research in products has 

 already resulted in increased revenues from lands, and similar work should stabilize indus- 

 tries which are dependent on fluctuating markets. — E. N. Munns. 



832. Wilson, E. H. The romance of our trees. VII. The beeches. Garden Mag. 31 : 

 115-119. 4 fig. 1920.— See Bot. Absts. 6, Entry 1471. 



833. Wilson, E. H. The romance of our trees. IX. Whence came the common fruits. 

 Garden Mag. 31 : 259-263. 1920.— See Bot. Absts. 6, Entry 1472. 



BOTANICAl. ABSTRACre, VOL. VII, NO. 2 



