418 EXPERIMENT STATICTN" RECORD. [Vol.41 



A.pril, 1919; condensed climatological summaries, and the usual climatological 

 tables and charts, these numbers contain the following articles: 



No. 3. — Convectioual Clouds Induced by Forest Fires (illus,), by F. A. Car- 

 penter; Notes on a Cumulus Cloud Formed over a Fire, by C. A. Reichelt; 

 Rain from Cumulus Clouds over Fires (illus.), by J. P. Espy (extracts) ; 

 Heights of Cumulus Clouds Forming over Fires (illus.), by S. P. Fergusson 

 and C. F. Brooks ; Results of Observations of Clouds during the Solar Eclipse, 

 June 8, 1918 (illus.), by S. P. Fergusson; Clouds in East Texas, June 8, 1918 

 (illus.), by C. F. Brooks; The Reflecting Power of Clouds, by L. B. Aldrich 

 (Abs.) ; An Improvement in the Pole Star Recorder (illus.) by B. C. Kadel ; 

 The Duration of Moonlight, by A. McAdie (reprinted) ; On the Relations of 

 Atmospheric Pressure, Temperature, and Density to Altitude (illus.), by H. H. 

 Kimball ; Temperatures, Pressures, and Densities of the Atmosphere at Various 

 Levels in the Region of Northeastern France (illus.), by W. J. Humphreys; 

 The Minimum Temperature at the Base of the Stratosphere, by W. J. Humph- 

 reys; Vv'hy There Are No Clouds in the Stratosphere (illus.), by W. J. Humph- 

 reys; The Daily Variation of Temperature in the Lower Strata of the Atmo- 

 sphere, by W. H. Dines ( reprinted ) ; On the Diurnal Incidence of Maximum and 

 Minimum Temperatures at Eskdalemuir, by A. C. Mitchell (Abs.) ; Influence of 

 Snow Cover on the Temperature Distribution in Utah, January, 1919 (illus.), 

 by T. A. Blair ; The Effect of Gunfire on the Rainfall of the British Isles, by 

 H. R. Mill (reprinted abs.); Tornado at Porter, Oklahoma, March 15, 1919 

 (illus.), by J. A. Reihle; The Storm of March 16, 1919, at Fort Smith, Ark., by 

 L. J. Guthrie; General Extent of Collegiate Instruction in Meteorology and 

 Climatology in the United States, by C. F. Brooks; Meteorological Observa- 

 tions while Traveling, by R. DeC. Ward (Abs.) ; Some Economic Effects of the 

 Mild AVinter, 1918-19 ; and Measurements of the Solar Constant of Radiation 

 at Calama, Chile, by C. G. Abbot. 



No. 4- — Aerological Investigations of the Weather Bureau during the War 

 (illus.), by W. R. Gregg; Some Scientific Aspects of the Meteorological Work 

 of the United States Army (illus.), by R. A. Millikan; The Military Meteoro- 

 logical Service in the United States during the War (illus.), by B. J. Sherry and 

 A. T. Waterman; Two-Theodolite Plotting Board (illus.), by W. C. Haines and 

 R. A. Wells; Some Observed Irregular Vertical Movements of Pilot Balloons 

 ( illus. ) , by I. R. Tannehill ; The Work of the Aerographic Section of the Navy, 

 by A. McAdie ; Work of the Naval Observatory in Connection with Naval Aero- 

 graphy, by C. T. Jewell ; INleteorology in the Naval Aviation Service Overseas 

 (illus.), by R. H. Finch; Blue Hill Methods of "Pilot Ballooning" (illus.), by 

 I. Mall; British Pilot-Balloon Methods; The Shoeburyness System (reprinted) ; 

 Free-Balloon Flight in the Northeast Quadrant of an Intense Cyclone (illus.), 

 by C. L. Meisinger; Weather during Some Notable Airship Voyages; Hot 

 Winds at Tampico, Mexico, April 6 and 7, 1919 (illus.), by S. A. Grogan; Tor- 

 nadoes in Eastern Nebraska, April 6, 1919 (illus.), by G. A. Loveland ; Tornado 

 in Southern Alabama, March 5, 1919 (illus.), by P. H. Smyth; The Larger Re- 

 lations of Climate and Crops in the United States (illus.), by R. DeC. Ward 

 (Abs.) (see p. 417) ; Minimum Temperatures Sustained by Apricots during 

 March, 1919, in the Pecos Valley, N. Mex., by C. Hallenbeck (see p. 444) ; The 

 Meteorological Activities of the Late Prof. Edward C. Pickering, by R. DeC. 

 AVard ; Walter Gould Davis, by R. DeC. AA'ard ; and Measurements of the 

 Solar Constant of Radiation at Calama, Chile, by C. G. Abbot. 



Climatological data for the United States by sections ( U. S. Dept. Agr., 

 Weather Bur. Climat. Data, 6 {1919), Nos. 3, pp. [212^, pis. J^, figs. 2; 4, pp. 

 [209], pis. 4, figs. 2). — These volumes contain brief summaries and detailed 



