1917] METEOEOLOGY. 513 



Bacteriological study of the air of Buenos Aires, H. Riganti {1. Conf. Soc. 

 Slid Amer. Hlg., Microbiol, y PotoL, 1916, pp. 813-SS5, fig. 1). — Kesults of ex- 

 aminations of samples of air taken under various conditions in different parts 

 of the city sliow wide variation in tlie germ content, depending upon conditions 

 of tempe.rature, illumination, ventilation, and character of the street surfaces. 

 Samples taken from the more densely populated parts of the city, where traffic 

 is greatest and the streets narrow and unpaved, showed a high germ content. 

 Under similar conditions with stone pavement the germ content was slightly 

 smaller, and it was decidedly less where tl^ streets were paved with asphalt. 

 The width of the streets, the height of the buildings, and the density of the 

 population influenced the germ content to a marked extent. 



Monthly Weather Seview (U. 8. Mo. Mcather Rev., 45 {1917), Nos. 3, pp. 

 91-U8, pis. n, figs. 8; Jf, pp. 149-201, pis. 10, figs. 25).— In addition to weather 

 forecasts, river and flood observations, and seismological reports for March and 

 April, 1917 ; lists of additions to the Weather Bureau Library and of recent 

 papers on meteorology and seismology ; notes on the weather of the months ; 

 solar and sky radiation measurements at Washington, D. C, during March and 

 April, 1917 ; condensed climatological summaries ; and the usual climatological 

 tables and charts, these numbers contain the following articles : 



No. 3. — Hail in the United States (illus.), by A. J. Henry (see p. 512) ; 

 Lightning and Forest Fires in California (illus.), by A. H. Palmer (see p. 512) ; 

 The Density of Snow, with a Note on the Disappearance and Settling of Snow 

 in 1915-16 near Reno, Nev. (illus.), by A. J. Henry and H. F. Alciatore; A 

 Modern Chinese Meteorological }iIonthly ; Meteorological Observations on United 

 States Lightships, by H. E. Williams ; Avalanche Wind at Juneau, Januai-y 26, 

 1917, by M. B. Summers; Tornado at Cincinnati, Ohio, March 11, 1917 (illus.), 

 by W. O. Devereaux ; Tornadoes of March 11, 1917, in Montgomery County, 

 Ohio (illus.), by R. F. Young; Unusual Hailstorm at Ballinger, Tex.; Severe 

 Local Storm at San Diego, Cal., February, 1917 ; Winter of 1916-17 at Green- 

 wich, England (reprinted) ; Cold Waves and Freezing Temperatures at Tampa, 

 Fla., by W. J. Bennett ; and A Skew Frequency Curve Applied to Stream Gauge 

 Data (illus.), by W. G. Reed. 



No. 4- — Equation of Horizontal Rainbows (illus.) (reprinted), by K. Otobe; 

 Improved Kite Hygrometer and Its Records (illus.), by W. R. Gregg; Ane- 

 mometer Records on a Buffalo Office Building Compared with Those Secured 

 Near the Surface of Lake Erie (illus.), by B. C. Kadel ; Some New Instruments 

 for Oceanographical Research (illus.), by H. Pettersson ; On Working Up 

 Precipitation Observations (trans.), by H. Meyer; Tornado of April 5, 1917, at 

 Tampa, Fla. (illus.), by W. J. Bennett; Tornado of March 23, 1917, at New 

 Albany, Ind. (illus.), by F. J. Walz ; Fish Killed by the Cold Wave of February 

 2-4, 1917, in Florida, by R. H. Finch ; Relation between Rainfall and Run-off lu 

 Hillebrand Glen, Nuuanu Valley, Oahu, Hawaii (illus.), by R. C. Rice; and 

 The Missouri Earthquake of April 9, 1917 (illus.), by R. H. Finch. 



Meteorological, magnetic, and seismic observations of the College of Belen, 

 Havana, 1916, L. Gangoiti {Ohservatorio Meteorologico, Magnetico y Seismico 

 del Colegio de Belen de la Compahia de Jesus en la Habana, ai'io de 1916. Ha- 

 hana, 1917, pp. 94)- — Detailed daily and monthly summaries are given and the 

 characteristic features of each month are described in notes. 



Meteorology, J. B. Tbi\-ett (A^. S. Wales Statis. Reg., 1915-16, pt. 6, pp. 

 345-414)- — Detailed tabular summaries of observations at Sydney and other 

 places in New South Wales during 1915 on temperature, pressure, precipitation, 

 and wind are given. 



