718 EXPEEIMENT STATION RECOED. 



" Variations of tlie solar radiation must be tlie real and most important cause 

 producing the changes of our climates and Iseeping them in a dynamic state." 



The climate of Duluth, Minnesota, H. W. Richakdson {Dvluth, 1914, pp. Jfi, 

 figs. iJf). — This publication, compiled by the local forecaster of the U. S. 

 Weather Bureau, presents briefly the principal facts concerning the climate in 

 the vicinity of Duluth and discusses the relation of the climate to the agricul- 

 tural possibilities of the region. 



A summary of meteorological records, J. E. Ostrandee { Massachusetts Sta. 

 Bui. 153 (1914), pp. 117-146).— In addition to summaries of observations on 

 pressure, temperature, precipitation, humidity, cloudiness, wind, and casual 

 phenomena made at the Massachusetts Station during the period from 1889- 

 1913, inclusive, this bulletin includes records of such available and apparently 

 reliable precipitation and temperature records as were made in Amherst previ- 

 ous to 1889, viz, those made by the late Prof. E. S. Snell of Amherst College and 

 his daughters (1836-1883) and those made at the state experiment station 

 under the direction of Dr. C. A. Goessmann (1883-1888). 



The summary for the 25 years (1889-1913) shows that the maximum pres- 

 sure reduced to freezing and sea level was 30.65 in. February 26, 1889; the 

 minimum 28.24 in. February 8, 1895 ; the mean 30.012. The highest temperature 

 recorded was 104° F. July 4, 1911; the lowest —26' January 5, 1904; the 

 mean 47.5°. The mean dew-point was 39; the mean relative humidity 74.6. 

 The greatest annual precipitation was 57.05 in. in 1897 ; the lowest 30.68 in. in 

 1908; the mean 43.76 in. Using all of the available data for temperature 

 (1837-1913) and precipitation (1836-1913) it was found that the mean tem- 

 perature was 46.9° F. ; the mean annual precipitation, 44.17 in. 



Meteorological observations at the Massachusetts Agricultural Experi- 

 ment Station, J. E. Ostbandeb and R. E. AIcLain {Massachusetts Sta. Met. 

 Buls. 307, 308 {1914), pp. 4 each). — Summaries of observations at Amherst, 

 Mass., on pressure, temperature, humidity, precipitation, wind, sunshine, cloudi- 

 ness, and casual phenomena during July and August, 1914, are presented. The 

 data are briefly discussed in general notes on the weather of each month. 



Weather report, W. H. Day {Ann. Rpt. Ontario Agr. Col. and Expt. Farm, 

 iS9 {1913), pp. 64-70). — Observations on temperature and precipitation and on 

 the length of the growing season at Guelph and at fourteen other places in On- 

 tario during 1913 are summarized. A wind record for Guelph is also given. 



Notes on the water of cranberry bogs, F. W. Moese {Massachtisetts Sta. 

 Bui. 150, pp. 62-68). — Studies of the composition of ditch water and seepage 

 water from small experimental bogs previously described were continued. 

 (E. S. R., .28, p. 324). 



It is estimated that the seepage water of the experimental bogs in 1913 con- 

 tained more than 21 lbs. of nitrogen, 10 lbs. of phosphoric acid, and 50 lbs. of 

 potash per acre. There appeared to be no direct relation between varying appli- 

 cations of fertilizers the pi'evious year and the composition of the drainage 

 water. There was, however, found to be a direct relation between free circula- 

 tion of water and drainage and vine growth. 



Bacillus coli in water supply, J. Race {Municipal Engin., 47 {1914), IS^o. 1, 

 pp. 12-14, figs. 3). — The author gives a warning against the present tendency to 

 minimize the value of the indication given by the presence of the Bacillus coli 

 communis in water supplies. He emphasizes the fact that the presence of that 

 organism in a sample of water, although not certain evidence that it is danger- 

 ously polluted, is a definite warning, which can not be safely ignored, that the 

 water is iwlluted and that the source of the pollution must be determined and 

 icept under close observation at all times to insure that it does not become 

 dangerous. 



