418 EXPERIMENT STATION RECORD. 



Mttoiniit is iiiiult' 1() slidw liy iiiciins i>f lii))ul:ir daln nntl cIimi'Is llio relation 

 betwiH'ii ])li:is('s of (he inoou and barometric ])r(>ssnr('. The jjeneral eonclnslon 

 reached is that the moon in its phases exerts an ai)i)reciahle inflnence ni)on the 

 earth's aliiKtsidiere. Whether this is direct or indirect has not l)cen (h'tinitely 

 determined. 



The relation of weather to crops and varieties adapted to Arizona condi- 

 tions, A. J. McCi.ATCiiiE and ,7. E. Coit {Arizona »S7«. Bill. 61, pp. 'i65-52'i. fig. 

 J). — This is in snbstance a revision of Bnlletin 48 of the station (E. S. R., 

 16, p. 235). "The arrangenient and a few of the statements and conclnsions 

 have been changed somewhat in order to make them accord more fnlly with 

 the facts brought out by an additional Ave years of observation. P»y far the 

 greatest change, however, has been the interpolation of a large amount of 

 information in regard to the adaptation of different varieties to different parts 

 of the Territory. This information has been secured not only from records 

 which have been accumulating at the station farm but from personal visits to 

 and circular letters sent out to many farmers in all parts of the Territory." 



Evaporation in a hog habitat, M. G. Dickey {Ohio Nat.. 10 {1909), No. 2, 

 pp. 17-23, figs. 2). — Observations on evaporation at different places on a bog 

 island in the Licking Reservoir near Columbus, Ohio, ai-e reported, and the re- 

 sults are discussed with reference to the influence of humidity, temperature, 

 and wind velocity. The effect of the growth of leaves in the early part of the 

 season and their fall at the end of the period of observation was also noted. A 

 short list of references to literature on the subject is given. 



Bulletin of the Mount Weather Observatory {U. 8. Dept. Agr., Bui. Mount 

 Weather Obiierv., 2 {1909), pt. 3, pp. 109-182, figs. 33, charts 6).— This number 

 contains the following articles: Certain Laws of Radiation and Absorption and 

 a Few of Their Applications (illus. ), by W. J. Humphreys; An Unusual Display 

 of False Cirrus, by W. J. Humphreys; The Aerological Congress at Monaco, by 

 A. L. Rotch; and Upper Air Data (illus.), by AV. R. Blair. 



Beport of the Chief of the Weather Bureau, 1907-8 (U. 8. Drpt. Agr., 

 Weather Bur. Rpt. 1907-8, pp. XX XI f 1+397). —Fart 1 of this document con- 

 sists of an administrative report reviewing the operations of the Weather 

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

 therein during 1907, and twicenlaily t)bservations for 20 selected stations during 

 1907; part 3, monthly and annual meteorological sunnnaries for ISS stations; 

 part 4, monthly and annual means and annual extremes of temperature and 

 dates of first and last killing frosts, 1907 ; part 5, monthly and annual precipi- 

 tation, 1907, and monthly and seasonal snowfall, 1907-8; and part 6, miscella- 

 neous meteorological tables and reports. 



The work of the year at Mount Weather was seriously Interfered with by the 

 destruction of the administration building by fire October 23, 1907, nevertheless 

 daily meteorological observations were continued as well as the special studies 

 on the upper air and in terrestrial magnetism and solar physics. A new 

 formula for computing the solar constant was developed as a result of seven 

 years' study of the problem of the measurement of the total heat which reaches 

 the outside limits of the earth's atmosphere from the sun. The use of the upper 

 air observations at Mount Weather in the weather forecasts issued at Washing- 

 ton was extended. Forecasts for periods of about a week in advance were made 

 experimentally during the year. 



Reference is made to the beginning of the preparation of a new series of 

 cliniatological papers, " in which the records of in-ecipitation, temperature, 

 dates of the first and last killing frosts, and prevailing wind directions are 

 collected, the precipitation tables including all available data since the year 

 1871. These reviews are made comorehensive for small sections of the United 



