644 EXPERIMENT STATION EECORD. [Vol.38 



secured from various parts of the United States. In basket-willow experiments 

 that have been under way for several seasons the purple, American green, and 

 Caspian varieties have been particularly successful. Data are also given on 

 the present condition of a number of tree species planted in 1909 and 1910 in 

 shelter-belt plantings at Akron, Washington County, with special reference to 

 determining their adaptability to the windy plains region. The results from 

 this experiment, as a whole, indicate that conifers will prove better than broad- 

 leaf species in the nonirrigated region of eastei-n Colorado. 



[Progress report on forestry investigations] (Missouri Sta. Bui. 151 (1917), 

 p. Jf5). — Investigations of the growth and culture of varieties of basket willow 

 for Missouri are being conducted by E. C. Pegg. Observations on the willow 

 holt to date show that the widest spacing yields the fewest rods and gives 

 greatest weight per rod, and the narrowest spacing yields the greatest number 

 of rods with least weight. Generally speaking, the number of rods is greatest 

 from tip cuttings and lowest from butt cuttings. 



A third examination was made of fence posts given various preservative treat- 

 ments and set in November, 1913. *' The most perishable woods are the syca- 

 more, basswood, willow, persimmon, cottonwood, birch, dogwood, black oak, 

 red oak, sugar maple, and ironwood. Charring the ends of poets previous to 

 setting them seems to have been successful only in the case of the sycamore. 

 In the case of black ash, redbud, and white elm it hastened the decay. Setting 

 in gravel and with one brush coat of hot carbolineum is of little value in pre- 

 serving perishable woods. Two coats of creosote lengthens the life of the 

 posts. The open-tank method of treatment confined the fungus attacks to less 

 than 7 per cent of the posts. No failures have yet occurred v/ith posts treated 

 in this manner." 



Report of the committee on forestry of tlie Hawaiian Sugar Pl?Lnters' 

 Association for the year ended September 30, 1916, L. A. Thurston et al. 

 (Eaivaii. Sugar Planters' Assoc, Rpt. Com. Forestry, 1916, pp. 33). — This re- 

 port contains data on tree-planting operations on sugar plantations in the Ter- 

 ritory of Hawaii, the working plan adopted by the Board of Agriculture and 

 Forestry for investigating the adaptability of different trees for specific pur- 

 poses, and reports by plantation managers upon the state of forestry upon 

 tlieir several plantations. 



A report upon the present status of forestry in Hawaii by C. S. Judd is also 

 included. Two new forest reserves were created in 1916, bringing the total 

 area of proclaimed forest reserves in the Territory up to 798,344 acres, of 

 which 546,352 acres consist of Government land. 



Eelation of stimuli to the cone production of western hemlock, R. Watson 

 (Jour. Forestry, 16 (1918), No. 2, pp. 16S-175). — Observations are given on the 

 effect of various stimuli in promoting seed production in the western hemlock. 



The author concludes in brief that " very little is as yet known regarding the 

 factors which influence the seed production of trees. Botanists have shown 

 that the vegetative and reproductive activity of plants may be controlled to a 

 certain extent by controlling the factors which influence the growth of the 

 plant. If the vegetative activities of thrifty western hemlock trees are sud- 

 denly checked by injuries, the tree usually is stimulated to reproductive 

 activity. Factors which commonly stimulate the tree thus are injuries by 

 fire and insects,, mechanical abrasions, wind-throwing, decapitation, and 

 girdling." 



Growth and manag'ement of piiion in New Mexico, H. H. Chapman and 

 C. E. Behee (Jour. Forestry, 16 (1918), No. 2, pp. 215-217).— On the basis of 

 growth data collected by the junior author on the Santa Fe National Forest, 

 it is concluded in substance that the retention and management of pluoa 



