840 EXPERIMENT STATION RECORD. [Vol.41 



available supply is limited. The author presents a complete analyses of 

 species which might be brought in from foreign sources to be sold as, or with, 

 black walnut. 



Instructions for the planting and care of conifer trees in cooperative 

 shelter belts {U. S. Dept. Ayr., Bur. Plant Indus., 1019, pp. 3). — The instruc- 

 tions herein given are applicable to the serai-arid regions of the West. 



Mechanical aids in stem analysis, E. C. Pegg {Jour. Forestry, 17 {1919), No. 

 6, pp. 682-685). — The author presents suggestions for lessening the labor con- 

 nected with stem analysis, especially office computations. The suggestions are 

 based on experience in cordwood and tie operations in the Ozark region of 

 Southern Missouri. 



Mensviration in France, D. Bruce {Jour. Forestry, 11 {1919), No. 6, pp. 

 686-690). — Observations on forest mensuration practices in France. 



Pathological marking rules for Idaho and Montana, J. R. Weir and E. E. 

 Hubert {Jour. Forestry, 17 {1919), No. 6, pp. 666^81). — The paper presents the 

 urgent need of forest sanitation in most of the timber sales conducted in Idaho 

 and IMontana, with special reference to the white-pine type of forest. An at- 

 tempt is made to formulate marking rules which are intended to cover the 

 removal of all infected trees upon the area which, if left, would act as a 

 menace to the remaining or future stands. Special attention is drawn to the 

 removal of infected trees below and above the specified diameter limits. The 

 practical application of such rules to the various forest types of the region is 

 discussed, together with methods and means of enforcing them. A bibliography 

 of literatui'e dealing with forest pathology is appended. 



[Fire protection in Maine in 1913] {Dept. State T^ands and Forestry [Maine] 

 Bui. 2 {1918), pp. 5-45). — A report for 1918 on forest fires and fire protective 

 measures for the year, both in the Maine fore.'-'try district and in other parts 

 of the State not included in this district. 



Report of the chief forest fire warden for the year 1918, G. H. Wirt {Penn. 

 Dept. Forestry Bui. 19 {1918), pp. 7^. pis. 7). — A statement of the work of the 

 Bureau of Forest Protection, including data on forest tires in Pennsylvania 

 during 1918 with comparative data for the two previous years. 



Forest fires in Canada, 1917 {Dept. Int. Canada, Forestry Branch Bui. 68 

 {1919), pp. 2Jt, figs. 12). — A statistical report on the extent and causes of forest 

 fires in the various Provinces ia Canada in 1917. 



Observations on some effects of fires in the chir (Pinus longifolia) forests 

 of the West Almora Division, H. G. Champion {Indian Forester, 45 {1919), 

 No. 7, pp. 353-364, pi. 1). — The author presents observations on the effects of 

 former and recent forest fires on stands of chir trees and other forest vege- 

 tation. 



Pulp and paper, 1917 {Canada Census Indus., 1917, pt. 4. Sect. 4, pp. 52+ 

 XI). — A statistical report on the pulp and paper industry in Canada for the 

 calendar year 1917. 



DISEASES OP PLANTS. 



The mode of dissemination of fungus and bacterial diseases of plants, 

 M. W. Gardner {Ann. Rpt. Mich. Acad. ScL, 20 {1918), pp. 359-423) .—The 

 bibliography appended to this discussion contains 220 titles. 



[The unreliability of certain appearances in diagnosis of plant diseases], 

 F. W. Neger {Centhl. Bakt. [etc.], 2. Abt., 48 {191S), No. 5-9, pp. 178-181).— 

 Examination of cases cited leads to the conclusion (liat in some plant diseases, 

 abnormal phenomena, though they may be prominent, are in many cases unre- 

 liable as diagnostic features. They may not be directly related to the cause of 



