248 



EXPERIMENT STATION RECORD. 



first place, the elm second, and the box elder and soft maple are con- 

 sidered next in value. Nearly all answers favor the planting of seed- 

 ling* trees as against sowing the seed. The opinions as to cultivation 

 vary and the author remarks that frequent shallow culture up to 

 August 1 may be taken as a safe guide. A majority of the growers 

 prune their trees to improve them in form. Cottonwood and box elder 

 are found to be short lived in upland groves. A list of trees suited to 

 each of the several sections of the State is given. 



A study of the influence of groves and forest areas on the humidity 

 of the air was made and the results are given in a table. 



Average daily humidity in the forest and in the open. 



Daily 

 mean in 

 forest. 



Daily 



mean in 



open. 



Mean dif- 

 ference. 



April 



May 



June 



July 



August. .. . 

 September. 



Per cent. 

 67. 9 



69.8 



77.4 

 74. 6 

 71.0 

 69.9 



Per cent. 

 64.2 



07. 3 

 73.9 

 04.6 

 69.6 

 01.8 



Per cent. 



::. 7 

 2. .", 

 3'. 5 

 10.0 

 2.0 

 8.1 



71.9 



66.9 



5.0 



Fraxinus eedenii, a new species of Javanese tree, J. G. Boerlage and S. H. 

 Koorders (Xtttnr. Tijd8chr. Neerl. Indie, 56 (1896), pp. 155-158; abs. in Bot. Centbl., 

 70 {1897), No. 5, pp. 162, 1< 



Pinus laricio in Corsica, M. L. Vilmorun (Rev. Hurt.. 69 (1897), No. 15, pp. 354- 

 358, fin*. ... 



Second-growth white pine in Pennsylvania, A. K. Mlodziansky (Gard. and 

 Forest, 10 (1S97), No. 490, pp. 



Forest fires, N. I. Crahay (Rapports Pre'liminaires 3e ( 'ongres Interna/. d'Agr., Brux- 

 eUes, 1895, pp. 311-326). 



Role of forests -with special reference to the physical and economical condi- 

 tions of a country and the necessity of forest extension, etc., E. Parisel and 

 A. Lecart (Rapports Preliminaires 3e Congres Internat. d'Agr., Bruxelles, 1895, pp. 

 75-114). 



The care of weak limbs of trees, .T. 6. Jack (Card, and Forest, If) (1897), No. 400, 

 j>p. 27 (-276, fig. 1). — Holts rather than bands are recommended for holding up broken 

 or weak limbs of shade trees. The injurious eft'eet of an iron band support is ill us. 

 trated. 



German woods, .1. Simpson (Garden., 52, No. 111.:, pp. 116-118, figs. 3). 



DISEASES OF PLANTS. 



The downy mildew of the cucumber ; what it is and how to pre- 

 vent it, F. 0. Stewakt [New York State Sta, Bui. 119, pp. 154-182, pis. 

 1, figs. 2). — It is estimated that in 18!»<> 75 per cent of the cucumber 

 pickle crop of southeastern Xew York was destroyed, probably 55 per 

 cent of the injury being due to downy mildew alone and 20 per cent to 

 all other causes. Notes are given on the injury done by the melon 

 louse, boreal lady-bird, an thracnose, and the cucumber wilt disease. Of 

 these the wilt disease was by far the most serious. 





