120 EXPERIMENT STATION RECORD. [Vol. 41 



term to take care of the decrease of rainfall above a certain elevation. For 

 the Puy du Dome, and probably for the rest of France, fc' is 1/20,000; thus, 

 the formula becomes, R=Rx+fcA— i (A/100)'." 



On a map of France the author shows the values of h for each Department. 

 ''■ h varies uniformly with latitude, ranging from 0.5 in the Pyrenees (latitude 

 43°) to 1.2 in the north (latitude 50°)." 



The rainfall may vary widely with the position and altitude of the rain 

 gauge on a given parallel of latitude, but if the gauges are sufficiently numerous 

 the algebraic sum of the variations is zero. 



ITrban v. suburban temperatures, J. AV. Redway (f7. S. Mo. Weather Rev., 

 Jf7 (1919), No. 1, pp. 28, 29). — Reviewing bi'iefiy records made at Battery Park, 

 New York City, and Mount Vernon, N. Y., the author reaches the general con- 

 clusion that " suburban days are somewhat warmer and suburban nights are 

 somewhat cooler than urban days and nights." He agrees with Kimball's view 

 that " the blanket of moisture, smoke, and dust over a city tends to prevent 

 radiation of heat at night, and during the day arrests mueii of the heat wliich 

 reaches the suburban station." 



Classification of clouds (U. S. Dept. Agr., Weather Bur. [1919], pp. [15], pis. 

 12). — ^This is a series of colored plates with brief explanatory matter to aid 

 observers in the identification of the several cloud forms, namely, cirrus, cirro- 

 stratus, cirro-cumulus, alto-cumulus, alto-stratus, strato-cunmlus, nimbus, 

 cumulus, cumulo-nimbus, stratus, fracto-stratus, and fracto-cumulus, according 

 to the international system of classification. A table of measurements of 

 heights of clouds at different places, namely, Potsdam 1896-97, Blue Hill 

 1890-91 and 1896-97, Toronto 1896-97, Washington 1896-97, Allahabad (India) 

 1896-97, and Manila 1896-97, is also given. 



Monthly Weather Beview (U. S. Mo. Weather Rev., Ift (1919), Nos. 1, pp. 

 64, pis. 17, figs. 19; 2, pp. 65-U2, pis. 17, figs. S3).— In addition to weather fore- 

 casts, river and flood obsei-vations, halo phenomena, and seismological reports 

 for January and February, 1919; 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 Januai-y and February, 1919; condensed climatological sum- 

 maries; and the usual climatological tables and charts, these numbers contain 

 the following articles: 



No. 1. — Work of the Smithsonian Astrophysical Observatory at Calama, 

 Chile, by C. G. Abbot; Terrestrial Weather and Solar Activities, by C. F. 

 Marvin ; Influence of the Solar Eclipse of June 8, 1918, upon Radiation and 

 Other Meteorological Elements (illus.), by H. H. Kimball and S. P. Fergusson ; 

 Proposed Magnetic and Allied Observations During the Total Solar Eclipse of 

 May 29, 1919, by L. A. Bauer; Simultaneous Occurrences of Lunar Halos and 

 Coronas, by C. F. Brooks; Lunar Halo and Paraselenic Circle Observed at 

 Colony, Wyo. ; Notes on the Comparison of Anemometers Under Open-air Condi- 

 tions, by A. N. Shaw; Southern California Windstorm of November 24-26, 

 1918 (illus.), by F. A. Cai-penter; The Terrific Windstorm on Mount Wilson. 

 Cal., November 24-26, 1918 (illus.), by W. P. Hoge; A New Altitude Record 

 (reprinted) ; Urban v. Suburban Temperatures, by J. W. Redway (see above) ; 

 Evaporation in the Canal Zone (illus.), by H. G. Cornthwaite; Evaporation 

 Compared With Vapor Pressure Deficit and Wind Velocity (iUus.), by E. S. 

 Johnston; Increase of Precipitation with Altitude (illus.), by A. J. Henry 

 (see p. 119) ; Altitude Relations of Rainfall in France, by E. Mathias (abs.) ; 

 The Conservancy Weather and Flood Warning Service (reprinted) ; and Gen- 

 eral Classification of Meteorological Literature, by C. F. Brooks (see p. 121). 



