METEOROLOGY WATER, 1113 



Meteorological observations at the Massachusetts Agricultural Experi- 

 ment Station, J. E. ()strandf:b and T. A. Barry (Ma.ssarliusctts Hta. Met. BuIk. 

 231, 232. itp. -'i carh). — Simimaries of observations at Amherst. Mass., on pres- 

 snre. temperature, humidity, precipitation, wind, sunshine, cloudiness, and cas- 

 ual phenomena duriii.i,' March and Ai)ril, 1908. The data are briefly discussed 

 in ;;enera] notes on the weather of each month. 



Weather report for 1907, W. H. Day (Ana. Kpt. Ontario Agi: Col. and Expt. 

 Farm, 33 (1901), pp. 2'i-27). — Tabular summaries are given of observations at 

 (Juelph and six other places in the Province of Ontario on temperature, precipi- 

 tation. ;ind length of season. A summary is also given of reports (»n buildinf,'s. 

 animals, and trees struck by lii,'htning during the year. 



Bulletin of the Mount "Weather Observatory ((/. .S'. Dcpt. .If//-.. BiiL Mount 

 Wnithcr Olmrr., I (lOOS), pt. 2, pp. 6 ',-133, fifffi. 12, charts- 3).— This number 

 contains the following articles: The Change of I'hase due to the Passage of 

 Electric Waves Through Thin Plates and the Index of Refraction of Water 

 for Such AYaves, with Applications to the Optics of Thin Films and I'risms 

 (illus.). by W. R. Blair; Pyrheliometer and Polarimeter Ob.servations (illus.). 

 by H. H. Kimball ; Note on the ^Movement of Moisture in Soils, by W. J. Hum- 

 phreys (E. S. R.. 10, p. 716) ; Note on the Magnetic Field due to an Electric 

 Current in a Straight Wire (illus.), by W. J. Humphreys; A Kite for Use in 

 High Winds, by W. R. Blair; and Tapper Air Temperatures for October, Novem- 

 iier, ;ind December (illus.). by W. R. Blair. 



Absolute determination of the nocturnal radiation at Vienna, J. Kremak 

 and R. Schneider (Sitzhrr. K. Alad. Wisf<. Wien, Math. Natanv. Kh, JIG 

 ililtn). Aht. Ila, pp. .571-600.; aJjs. in aSV/. A&.s>., Sect. A—Phyn., 10 (7.907), lYo. 

 ]20. pp. 652, 6.53). — Measurements 202 meters above sea level, 20 meters above 

 ground, and 2 meters above the instrument platform in August and September. 

 190(5, with two Angstrriui electric comiiensation actinometers are reported. For 

 5 nights readings were t.-iken every ir> minutes commencing at S p. m., that is, 

 about an luuir after sunset. 



It was found that the loss by radiation was very rapid at first, attaining its 

 maxiuuun between 9 and 10 p. m., declining then, but with a faint secondary 

 maximum at 2 a. m.. and continuing slow until about three-quarters of an hour 

 before sunrise, when the lo.ss was again rapid. With falling air temperature 

 the loss by radiation became less marked. The mean loss per minute per square 

 centimeter was 0.153 gram-calorie. " By reflex radiation from the nonluminous 

 atmosphere the ground in September gained 0.o7 calorie i)er square centimeter 

 l^er minute. The total radiation recei\ed from the sun during the three first 

 September days — as regularly measured by the pyrheliometer at Yienna — was 

 318, 821, 811 calories, or, allowing for diffusion losses of 40 per cent according 

 to Trabert, 445, 440, 4.^5 calories. Assuming the same rate of loss by radiation 

 for the day as determined for the night, the heat gain per square centimeter 

 would have l)tHMi on those three days -f 215, 228, 225 gram-calories per S(piare 

 centimeter, mean value 228 gram-calories per day." 



The climate and weather of Baltimore, O. D. Fassio (Md. Weather Serr., 2 

 (l!)07), PI). .7/7, ///.S-. 2'/. fills. 170). — This is the .second volume of a series of 

 reports on the climatic features of Maryland. The first volume (E. S. R., 12, 

 1». 110) was a general summary «»f all available information regarding the 

 physiography and meteorology of the State. This volume gives an exhaustive 

 study based upon all available pul)lic and private records of the climate and 

 weather of Baltimore and vicinity. 



"The report is divided into two jtarts. The first [which has jireviously been 

 printetl separately (E. S. R., !(!, p. 1058; 17, p. 581)] deals with the average 



