748 EXPERIMENT STATION EECOED. [Vol, 36 



confusion in the use of English names for many of our trees and suggests the 

 use of certain names for correcting this confusion to some extent. 



A forest census of Alabama by geographical divisions, R. M. Harper {Proc. 

 Soc. Amer. Foresters, 11 (1916), No. 2, pp. 208-2U, fig. i).— In tlie present 

 paper the author divides the State of Alabama into ten geographical divisions, 

 and gives a table showing for each of the ten regions and for the whole State 

 the percentage of forests in 1910, the expenditure for fertilizer in 1909 per 

 acre of improved land, the percentage of evergreens, and the percentage of the 

 present forest made up by each species of tree. 



Eorests of Crater Lake National Park, J. F. Peenot (U. S. Dept. Int., Off. 

 Sec. [Pub.], 1916, pp. 39, figs. 25). — A general account of the forest types in the 

 Crater Lake National Park, including descriptions of forest species. 



The administrative report of the Virginia state forester from March to 

 December, 1915, inclusive, R. C. Jones {Admin. Rpt. Va. State Forester, 1 

 (1915), pp. 48, figs. 8). — A summary of activities for the above period, together 

 with suggestions for extending the state forestry work and recommendations 

 for amendments to the present forestry laws. 



The growing stock as a criterion of normality, A. B. Recknagel (Proc. Soc. 

 Amer. Foresters, 11 (1916), No. 3, pp. SOSSlJf, fig. i).— A brief comparison of 

 methods of determining the normal growing stock in forests. 



Top diameters as affecting the frustum form factor for longleaf pine, H. H, 

 Chapman (Proc. Soc. Amer. Foresters, 11 (1916), No. 2, pp. 1S5-191) .—A. fur- 

 ther discussion relative to the application of the frustum form factor method 

 of eon.structing volume tables for different species of trees (E. S. R., 34, p. 641), 

 including the results of some tests of the form factor method on longleaf pine 

 in Alabama. 



The factor of top diameters in construction and application of volume 

 tables based on log lengths, H. H. Chapman (Proc. Soc. Amer. Foresters, 11 

 (1916), No. 2, pp. 221-225). — In this paper the author calls attention to the 

 errors which are apt to be made in connection with the use of the top diameter 

 in the construction and application of volume tables based on log lengths. 



The Biltmore stick and the point of diameter measurements, D. Beucb 

 (Proc. Soc. Amer. Foresters, 11 (1916), No. 2, pp. 226-229) .—The author here 

 presents data to show the extent of error which may arise in using the Biltmore 

 stick (E. S. R., 25, p. S43; 31, p. 341) by taking the measurements at the wrong 



height. 



Utilization of wood waste by chemical means, H. F. Weiss (Proc. Soc. 

 Amer. Foresters, 11 (1916), No. 2, pp. 177-184) .—iJ^ this paper the author briefly 

 describes the chemical processes now established in the United States which 

 utilize wood waste, gives the extent to which they are now commercially 

 established, and discusses their future outlook for expansion. 



DISEASES OF PLANTS. 



[Plant diseases in Porto Rico], J. A. Stevenson (Rpt. Bd. Comrs. Agr. P. R., 

 J, (1914-15), pp 33-44) .—This is a report of the pathologist covering the period 

 from July 1, 1914, to June 30, 1915. 



Citrus scab, ascribed most commonly to Cladosporium citrt, has begun to 

 attack grapefruit. Fruit rot, or mal di gomma, seems to be on the wane at 

 present. A Fusarium, as yet undetermined as to species and parasitic char- 

 acter, has been found present in typical fruit rot cases, but proper drainage 

 and use of stocks other than lemon are expected to eradicate the disease. 

 Fruit rots causing considerable loss during the season are ascribed to such 

 fungi as Penicillinm spp. RMzopus nigricans, Aspergillus niger, and Diplodia 



