METEOROLOGY — WATER, 17 



tended to working tables whenever it is felt that the adopted coefficients of this 

 report are reliable." 



Influence of soil mulches in checking evaporation, D. H. Bark {Mo. 

 Weather Rev., 38 {1910), No. 7, pp. 1098, 1099, figs. 2).— This is a brief article 

 based upon experiments reported in detail in a bulletin of this Office (E. S. R., 

 IS, p. 1087). 



The fight against hail {Abs. in Rev. 8ci. [Paris], 48 {1910), II, No. U, p. 

 JjSo). — This is a brief discussion of the possibility and practicability of the 

 explosive method of hail protection. 



Frosts in Wisconsin: Occurrence, prediction, and methods of prevention, 

 .7. L. Bartlett {Bui. Univ. Wis. No. 290, pp. J,3, figs. 9).— This bulletin explains 

 the principles of frost formation, atmospheric and local conditions affecting the 

 occurrence of frost, the occurrence of killing frosts in Wisconsin, the prediction 

 of and damage caused by frosts, methods of artificial protection, and practi- 

 cability of frost protection in Wisconsin. A short bibliography of the subject 

 is given. 



Report of the Chief of the Weather Bureau, 1908-9 {U. S. Dept. Agr., 

 Weather Bur. Rpt. 1908-9, pp. 268, figs. 2).— Part 1 of this document consists 

 of an administrative report reviev?^ing the operations of the Weather Bureau 

 during the year; part 2 gives a list of observing stations and changes therein 

 during 1908, monthly records of sunshine at 137 stations, and records of exces- 

 sive rainfall during 1908 ; part 3, monthly and annual meteorological summaries 

 for 186 stations; part 4. monthly and annual means and annual extremes of 

 temperature and dates of first and last killing frosts, 1908; and part 5. monthly 

 and annual precipitation, 1908, and monthly and seasonal snowfall, 1908-9. 



The report records progress in the reconstruction of the administration build- 

 ing destroyed by fire October 23, 1907, in aerial and magnetic observations, and 

 observations on solar radiation, and in studies on evaporation and on snowfall 

 in mountains, and notes the establishment of new meteorological stations at 

 Eagle, Tanana, and Valdez in Alaska, the successful prediction of the Key 

 West hurricane of October 11, 1909, and the adoption of a new form of publi- 

 cation of the Monthly Weather Review (E. S. R., 22, p. 419). 



Monthly Weather Review {Mo. Weather Rev., 38 {1910), No. 7, pp. 991- 

 1146, figs. 3, charts 33). — This number contains the usual climatological sum- 

 maries, weather forecasts and warnings for July, 1910, river and flood observa- 

 tions, lists of additions to the Weather Bureau library and of recent papers 

 on meteorology and seismology, a condensed climatological summary, and cli- 

 matological tables and charts. There are also special papers on Influence of 

 Soil Mulches in Checking Evaporation (illus.), by D. H. Bark (see above); 

 Frost Fighting, by A. B. Wollaber (see p. 38) ; The Disposition of Smoke, by 

 A. G. McAdie; Report on the Aimual Rise in the Columbia River, 1910 (illus.), 

 by T. F. Drake ; Frost Fighting in the Boise Valley, by E. L. Wells; and Studies 

 on the Phenomena of the Evaporation of Water Over Lakes and Reservoirs, 

 VII, by F, H. Bigelow (see p. 16). 



Meteorological notes and data, A. F. Mantle and G. A. Charlton {Ann. 

 Rpt. Dept. Agr. Prov. Saskatchewan,. 5 {1909). pp. 99-111, 197-200).— ^otes are 

 given on the weather of Saskatchewan during each month of 1909 as compared 

 with the conditions in 1907 and 1908. Tables show the geographical position 

 and elevation of the meteorological stations in the Province, the minimum, 

 maximum, and mean temperature at these stations during each month of 1909, 

 and the average monthly and annual precipitation for the Province during 

 1907 to 1909 as compared with the average for 10 years. There is also a table 

 which shows the maximum and minimum daily temperatures at Regiua during 

 each month of 1909. 



