520 EXPERIMENT STATION RECORD. 



plants grown in pots. The experiments were conducted with Hydrangea, f'alisiephus 

 chinotsis, Campaivila alliariifoUo, and Licolis radiata. 



The limit of coneentration of nutrient solutions for fung'i, T. Bokorny 

 {Allg. Emu. u. llopfcn Zt(j., 1900, Xo. 51, p. 553). 



A classification of the fleshy Pezizinese, E. J. Ditrand {Bui. Torrey Bot. 

 Cbih., 21 {1900), Xo. 9, pp. 463-495, plx. '!). 



METEOROLOGY. 



How to prevent hailstorms, 1*. X. Kritski [Trudl Iinj?. Voln. 

 Eh>n. (^h.sh.,1899, No. 2,])p' 103-205).— The cause of hailstorms being, 

 according' to the author, the accumulation of electric energy in the 

 clouds, he proposes to diminish this accumulation and thus probably 

 entirely prevent hailstorms by means of a kite similar to that used 

 ])y Franklin in his famous experiments. The kite is to be made of a 

 rectanouliir piece of light fabric stretched over a wooden frame. For 

 a wind with a velocity less than 7 meters per second kites al)out 4 meters 

 in length and 2.6 in width are recommended; for a wind with a greater 

 velocity than T meters per second ^."2 hy 2.1 meters are suitable. The 

 tail consists of a cord 8 mm. in thickness to which 3 cones are consecu- 

 tively attached. The first cone has a diameter of 450 mm. and is situ- 

 ated 10 meters from the kite, the second 300 nmi. in diameter is situated 

 4 meters from the first, and the third of the same diameter is situated 3 

 meters from the second. To the kite are attached 4 copper rods each 

 350 nun. long and 4.5 mm. in diameter. The rods each terminate in a 

 point either made of platinum or plated with the latter and are in metal- 

 lic contact with the wire (or rope) to which the kite is attached. The 

 other end of this wire ma}' be in contact with the earth, or with some 

 device for storing and utilizing the electricity drawn from the sky. 

 The kite wire need not be more than 3,500 ft. long (the mean height 

 of the clouds). The kites should be kept fl}' ing until the danger of the 

 hailstorm has passed. — p. fireman. 



Monthly Weather Revie-w {C^. jS. Dept. Ayr., WeatJi.tr Bureau., 

 Monthly Weather Bevieic, 28 {1900), JVos. 4, pp. Ul-191,Jigs. 4-, charts 

 9; r>^pp. 193-238, f(js. .f, c/iart.^ 8; 6, pp. 239-278, fg. 1^' charts 8). — 

 In addition to the usual reports on forecasts, warnings, weather, and 

 crop conditions, meteorological tallies and charts, and lists of recent 

 papers on meteorology, these numbers contain the following articles 

 and notes: 



No. 4, special contributions on Special report on the floods in tlie Colorado \-a\- 

 ley, Texas, April 7 to 17, 1900, and other floods during the same period (illus. ), by 

 I. M. Cline; The drougiit of 18U9 in southwest Missouri, by J. S. Hazen; The clima- 

 tology of Habana, Cuba, by E. del IVIonte; Phenological observations on the Potomac, 

 by F. W. Very; and notes by the editor on death of Mr. Cyrus Ellenberger, storm 

 waves not tidal waves, an ice storm, storm in Yucatan, local anemometric i)eculiari- 

 ties, the seasonable rain in Colorado, freshets in James River, \'irginia, i)hcnology in 

 Ohio, hail and its methods of formation, studies in raindro[)s, the fonnation of large 

 raindrops, photography in meteorology, a new meteorological journal, the effects of 



