METEOROLOGY WATER. 1013 



Meteorology {Xrw Zeal. Off. Yearbook 1008, pp. (;/S-6',^.3).— Tabular suin- 

 niaries are given of observations on temijerature, rainfall, atmospheric pressure, 

 and wind at 14 stations in New Zealand during the year 1907. 



Handbook of climatology, J. Hann (Handbuch dcr KUmatologic. Stuttgart^ 

 l!)OS, 3. cd., rcr. and cnl., pp. XIV+394; rev. in Nature [London], 19 (1909), 

 Ao. 20.'iS, p. 363). — This is the third revised and enlarged edition of this hand 

 book. The most important revision is in connection with the sections on radia 

 tion, cyclical changes of climate, methods of computing averages for tempera 

 ture and rainfall from incomplete or short series observations, and climatic 

 zones of the globe. 



Variations in climate, H. Arctowski {Compt. Rend. Aead. Set. [Paris], 

 l->,7 (1908), No. 25, pp. U38-1U0; abs. in Rev. Set. [Paris], J,l {1909), I, No. 1, 

 p. 27; Sei. Abs., Seet. A—Phys., 12 {1909), No. 13',, p. 72).— On the basis of ob- 

 servations on temperature recorded during more than 50 years in different parts 

 of the earth, but particularly fi-om 1S91 to 1900 in France, the author concludes 

 that there are exceptionally warm or exceptionally cold years. 



Temperature differences are not alike in size and magnitude at different 

 places, but in many cases the A-ariations at one place are the opposite of those at 

 another. The amount of compensation between different stations is apparently 

 insufficient to permit of the assumption of a constant mean temperature at the 

 earth's surface. It is suggested that this is due to variations in intensity of 

 solar radiation. 



Public water supplies, F. E. Turneaure and H. L. Russell {New York and 

 London, J'JU8, 2. cd., rev. and enl., pp. XV +808, figs. 231). — This is the second 

 revised and enlarged edition of this standard work. 



" The chapters relating to the purification of water have been thoroughly 

 revised, that on mechanical or rapid filtration being rewritten and greatly en- 

 larged. . . . Besides the matter relating to purification many other changes and 

 additions have been made in nearly every chapter. The most important of 

 these relate to methods of bacterial examination of water, the investigation of 

 ground water and the construction of collecting works, data on the use of 

 water, data on rainfall and flow of streams, the construction of dams, and the 

 application of reenforced concrete to conduits, dams, filters, reservoirs, and 

 tanks. The literature of each chapter has also been extended and brought up 

 to date." 



Chemical and biological survey of the waters of Illinois, E. Bartow et al. 

 (Univ. III. Bill., G (1908), No. .',, pp. 80, figs, i.j).— This report gives "a detailed 

 description of the work accomplished during tlie IG months ending December 31, 

 1907, with a summary, by years, of the analyses made since the foundation of 

 the survey to that time, and a summary, by months, of the analyses made dur- 

 ing the last two years. The new quarters into which the survey moved during 

 the summer of 1907 are described. 



" The progress of the cooperative worli with the State board of health, and 

 with the engineering experiment station of the University of Illinois, tlie State 

 geological survey, and the Water liesources Branch of the I'nited States (Jeolog- 

 ical Survey, is reported. 



"There are included the descriptions of several exi)eriments or investigations 

 carried on by the survey." Among these are Sanitary Chemical Examination of 

 Water I'>acteria, by A. W. Sellards; Stand for Fermentation Tubes, by W. G. 

 Bain; Laboratory Experiments in Water Treatment, liy E. Bartow and J. M. 

 Lindgren ; Normal Waters of Illinois: Inve.stigation of .Manufacturing Waste at 

 Wankegan ; and Character of the T'nderground Waters of Normal. 



From the study of normal waters of Illinois, the conclusion is drawn "tliat 

 waters from deep rock wells though varying in composition at different depths 



