960 EXPERIMENT STATION RECORD. 



forentera and watchmen. The State forests are divided into ranges, which average 

 166,250 acres; and for forest management, administration, and instruction in the 

 State college of forestry and 6 schools of forestry the annual expenditures are 

 f 480, 000. In 1899 the total income to the Government from the State forests 

 amounted to more than $2,000,000. 



Forest tree planting on the estate of Nikolsko-Serg-ievskoye, N. Sukhodski 

 {Seld: Klioz. I Lyesov., 200 {1901), Feb., pp. 335-344) .—Y.^^pmrnenis in planting oak, 

 ash, maple, birch, elm, linden, pine, larch, locust, and willow in a locality where 

 there are no natural forests. The experiments have been continued since 1893, and 

 extend now over an area of about 150 acres. The results are satisfactory. — p. fireman. 



The spruce forests of Canada ( Queensland Agr. Jnvr., 10 {1902), No. 2, p. 127). — 

 In quoting from the report of the superintendent of forest ranges of Quebec, it is 

 stated that the world's demand for pulp wood, on the basis of its present supply of 

 1,500,000 tons annually, can be met by the Canadian spruce forests for 840 years. 

 The extent of the spruce forests in the 4 provinces is given as follows : Ontario, 

 52,818,420 acres; Quebec, 144,363,454 acres; New Brunswick, 11,224,540 acres; and 

 Nova Scotia, 10,853,544 acres. 



Hybrid conifers, M. T. Masters {Jour. Roy. Hart. Sac. [London], 26 {1901), No. 

 1, pp. 97-110, figs. 9). — A number of what are believed to be natural hybrids between 

 different species of conifers are mentioned, and a description given of a hybrid pro- 

 duced by the late Henry de A'ilmorin, who succeeded in 1867 in producing a hybrid 

 between Abies 2nn,sapo and A. rephalonlca. 



Notes on the supposed hybridization among* eucalypts, H. Deane and J. H. 

 Maiden {Proc. Linn. Soc. New South IVales, 26 {1901), pt. 2, pp. ^.SP-.?^.?) .—Hybridi- 

 zation among eucalypts has been a subject of considerable discussion, and attention 

 is called to a supposed case of hybridism between known species. While not deny- 

 ing the existence of the hybridity of the species, the authors hold their opinion in 

 suspense and for the time being describe an interesting new form. 



DISEASES OF PLANTS. 



Report of the botanical section of the experiment station of the Pomologi- 

 cal Institute, Proskau, III, R. Aderhold {Centbl. Bait. u. Par., 2. Abt., 7 {1901), 

 No. 17-18, pp. 654-662). — Notes are given upon a number of diseases which were more 

 or less under investigation during the period covered by the report. The shot-hole 

 and other leaf-spot diseases of stone fruits were investigated and it was found that 11 

 genera and 26 species of fungi were the causes of these diseases. Further notes are 

 given upon Mycosphscrellu cerasella, the perethecial form of Cercospora ceraseUa, a pre- 

 liminary account of which was noted in E. S. R., 12, p. 768. Infection experiments 

 with Cladosporium cerasi seemed to point to the identity of a number of so-called spe- 

 cies of that genus of parasites. The perethecial form of the species under investiga- 

 tion is said to be Venturia cerasi. A Monilia-like disease of cherries was investigated 

 and found to be due to Fusarium gemmiperda, n. sp. The fungus was quite conspicu- 

 ous upon the dead buds of cherry trees in the spring of the year. The occurrence of 

 the brown slime flux upon young apple trees is noted. It appeared in May, 1900, 

 upon a number of 3-year-old trees. The cause of its occurrence is believed to have 

 been a severe frost that occurred late in April of the same year. A study was made 

 of the morphology of the plum rust {Pnccinia pruni), and it is claimed that 2 distinct 

 types of the fungus were found, differing mainly in the character of their teleuto- 

 spores. The typical form occurred upon Prunus spinosa, P. domestica, P. institia, and 

 P. americana; while the other form, which by some authors is considered a distinct 

 species, occurs normally on Persica vulgaris, Amygdalus conimunis, and Armeniaca md- 

 garis, and rarely upon some of the other species of allied plants. Investigations of 



