748 experime;nt station record. 



siKjcial reforence to bis work aud that of Rauiaun, dealing with the variation 

 in time of nutrient assimilation among forest trees (E. S. R., 26, p. 443; 27, p. 

 630). Results of recent analytical studies of red alder and elm trees are pre- 

 sented in tabular form and discussed in connection with previous investigations. 



A montane rain-forest. — A contribution to the physiological plant geog- 

 raphy of Jamaica, F. Shrkvk ((Jarncgu: Inst. WfiKhinfftoti Pub. li)9 {191.'/), pp. 

 110, pU. 29, flfiH. 18). — In this work the author presents the results of a study 

 of the general physiological plant geography, as well as investigations on 

 transpiration and growth in typical rain-forest forms occurring in the Blue 

 Mountains in Jamaica. 



A conspectus of North. American firs (exclusive of Mexico), W. II. I.amb 

 (Proc. »S'oc. A))icr. Foresters, 9 {19U), No. J,, pp. 52S-.'}38. flfjs. 15). — The pur- 

 pose of this paper is so to define and illustrate the distinguishing characteristics 

 of North American firs that the grou]) may be easily distinguished by forest 

 officers. 



A bibliography of reference literature is ai)i>endeii. 



Forest planting in Arizona and New Mexico, G. A. Pearson {Proc. Sac. 

 Amer. Foresters, 9 (1914), A^o. 4. PP- -J57-478). — This article embraces the results 

 at present available from the efforts toward solving the reforestation problem 

 on the National Forests in the Southwest. The data here presented are based 

 on general planting operations in the Southwest and intensive experiments at 

 the Fort Valley Experiment St^ition aud at the Fort Bayard Nursery. 



Reforestation of brush fields in northern California, K. H. Boebkeb (For- 

 estry Quart., IS (1915), No. 1, pp. 15-2.'f). — A descriptive account of reforesta- 

 tion operations conducted on the Lassen National Forest, northern California, 

 including information relative to costs of reforestation. 



Charcoal as a means of solving .some nursery problems, G. A. Retan 

 (Forestry Quart., 13 (1915), No. 1, pp. 25-30). — An experiment conducted in 

 the nursery at the Penn.sylvania State Forest Academy in the use of charcoal 

 as a dressing for forest seed beils is described. Included in the experiment 

 was a comparative test of charcoal and commercial fertilizer. 



Beds treated with charcoal gave a larger germination percentage than un- 

 treated beds. A constant observation of the beds seemed to indicate that 

 where the proportion of charcoal in the bed is large there is less " damping-off." 

 Thus far no definite results have been secured with reference to the comparative 

 value of charcoal aud the commercial fertilizer. 



Organization of forest fire control forces, C. Du Bois (Proc. Soc. Amer. 

 Foresters, 9 (1914), ^^o. 4, PP- 512-521). — A discussion of methods of organizing 

 and directing fire protective bodies. 



Tables for determining profits in forestry, W. D. Stebrett and W. B. 

 Barrows (Forestry Quart., 13 (1915), No. 1, pp. 12-14)- — A table is here given 

 and discussed which aims to show for quite a wide range of yields and stump- 

 age prices what will be the net profit and corresponding compound interest 

 rate on a number of different initial investments. . 



A practical system of logging cost accounting, S. B. Detwileb (Forestry 

 Quart., 13 (1915), No. 1, pp. 8-11). — A logging cost accounting system is de- 

 scribed which was used by the author with satisfactoi-y results and is believed 

 to be adapted to nursery work and other lines of forestry. 



DISEASES OF PLANTS. 



Report of the experiment station for plant diseases. 1913, H. C. MiJXLEB et 

 AL. (Ber. Agr. Chem. Kontroll u. Vers. Stat. Pflanzenkrank, Prov. Sachsen, 

 1913, pp. 63-73). — This contains brief notes of plant diseases as reported by 



