FORESTRY. 543 



theba'icd) is deseribofl relative to the botany of tliis i»alin and the slnieture of 

 the fruit and seed. 



Wattle growing' for bark, L. E. T.VYr.ou (Tniiisvnal Dri^t. A(/i\, Fdrmrrs' 

 Huh ion. ii/i. I.',. />/.>>•. 6). — This is a iiopular jjcnide for jtrospective planters. Part 

 1 discusses in detail the formation of the plantation. i)art 2 deals with tlu' 

 exploitation of the hark and timber, and part .'i with regeneration. Conc-ludinj? 

 remarks discuss piotection from tire and injurious insects. 



Some factors which influence the yield of resin from Pinus longifolia, 

 E. A. Smythies {Indian Forester, 36 {1910), No. 5. pv- 27H-2S3, fiyK. .5).— The 

 discussion of these factors is based upon the systematic tapping of chir piui! 

 (P. longifolia) which has been carried on in the Naini Tal division of the 

 Indian forest service for the last 15 years. 



The author finds that the yield of resin is strongly affected by the seasons, 

 hot weather giving a maximum. The yield also depends on the year of tap- 

 ping, the third year usually giving the best results. The number and quality 

 of the laborers employed, together with the health of the tree, are also factors. 

 The yield decreases as the limits of distribution of the species are approached. 



The behavior of chestnut wood under destructive distillation and the 

 resulting' products, G. Borghesani (Cliem. Zig., 3.) .{1910), No. 69, pp. 600, 

 610). — Destructive distillation of chestnut wood as conducted by the author is 

 reported, together with a table showing the percentage of coal and distillation 

 products obtained from the trunk. Itranches, and root. 



The results indicate that by u.sing the destructive distillation process there 

 Is a greater increase in the coal residue of the trunk than of the branches, but 

 that the reverse is true of the products of distillation. The roots hold an inter- 

 mediate position in both respects. As far as this process is concerned chestnut 

 wood appears to rank between beech and oak in value. When the rapidity of 

 distillation is increased, the greater amount of noncondensable gas secured is 

 offset by the increased cost of the coal and likewise of the distillation ])roducts. 



The prospects of the match industry in the Indian Empire, with particulars 

 of proposed match-factory sites and "w^oods suitable for match manufacture, 

 R. S. Troup {Indian Forest Mem., Econ. Products Ser., 2 {1910), No. 1. pp. III + 

 92-\-LXXX, figs, l), map 1). — A general discussion. 



A lecture on the Para rubber tree (Hevea brasiliensis), W. J. Gallagher 

 {Dept. .Agr. Fed. Malay States Bui. 10, pp. 21, figs. 10). — This lecture contains 

 information relative to the physiology and anatomy of the I*ara rubber tree, 

 together with a discussion of various tapping methods, systems, and tools, and 

 notes on planting distances, thinning out, topping, pruning, resting, and the 

 function of latex. 



Propagation of guayule by seeds, J. E. Kirkwood {Atuer. lirr. Trop. Agr., 

 1 {J910), Nos. 2, pp. 34-.'i3, figs. 2; 3-!,, pp. 77-8/, ) .—Results are given of ex- 

 periments conducted by the author under the direction of the Continental Mexi- 

 can Rubber Company mainly for the purpose of determining the feasibility of 

 I)ropagating the guayule rubber shrub {PaHhenium argeiitatum). 



The records of germination were kei)t from day to day. The first of the 

 seedlings ajipeared in 10 days from the date of the plantings, whicli were 10 in 

 number, and the germination continued up to (>() days. In all, some 1(;2 seeds, 

 or about 2.9 per cent of the seed sown, germinated. This appears to l)e the 

 only case on record of an attempt to germinate seeds of the plants of the genus 

 Tartheuium. 



The results obtained in the germination of guayule seeds were as a whole 

 favorable as to the time required. Although most of the seeds responded 

 quickly a considerable number continued dormant, sometimes for weeks, then 



