6] 6 EXPERIMENT STATION RECORD. 



gross draft should be reduced by that portion of the rainfall over the surface 

 of the reservoir not included in the run-off." 



Suggestions for frost protection, K. F. Kelleeman (Jour. Wash. Acad. 8ci., 

 S {1913), No. 3, pp. 53-55). — Three methods of utilizing water as a protection 

 against frost are suggested: "(1) The atomizing, or spraying by the use of 

 power sprays, of fine mists of water which might be warmed at a central 

 station; (2) the suspension of pans holding small quantities of water above 

 each of the fire pots now in use; and (3) the pumping, through a permanent 

 system of pipes, of steam generated at a central station and mixed with large 

 quantities of air to prevent condensation in the pipes." The theoretical possi- 

 bilities of the first only are discussed. 



It is estimated that using this method " for a body of air 26 ft. deep, covering 

 1 acre, 86.7 gal. of water at 194° F. would be necessary to raise the tempera- 

 ture from 30.2° to 32°, if the humidity was 80 per cent; 31.8 gal. more would 

 be required to raise the temperature to 33.8° ; 32.2 gal. additional for 35.6° ; 

 and 32.6 gal. additional for 37.4°. Probably much larger quantities would be 

 necessary in actual practice, due to loss of heat by convection currents, by im- 

 perfect distribution of the water, and by the radiation continually taking place 

 into the air outside of the heated zone." 



Weather record, 1912, E. Burke {Montana Sta. Rpt. 1912, p. 87). — This is a 

 tabulated monthly summary of observations at Bozeman, Mont, on tempera- 

 ture, precipitation, cloudiness, and wind. The highest temperature recorded 

 during the year was 87° F., July 25 and August 25, the lowest — 19°. January 2. 

 The total precipitation for the year was 21.65 in. The last killing frost in the 

 spring occurred May 28. The first killing frost in autumn occurred Sep- 

 tember 15. 



Report of the consulting meteorologist, J. F. Vooehees {Tennessee Sta. 

 Rpt. 1911, pp. 183-187, figs. 7).— The rainfall of Tennessee in 1911 is compared 

 with the normal rainfall of the State and discussed in relation to crop produc- 

 tion. It is stated that " the average rainfall for this State is ample for six 

 times the average crop produced " if properly utilized. 



Report of the consulting meteorologist, J. F. Vooeheies {Tennessee Sta. 

 Rpt. 1912, pp. 66-68, figs. 5). — A chart shovsdng rainfall distribution in Ten- 

 nessee during 1912 is given and discussed with reference to the double cropping 

 system. The relation of weather conditions to the growth and maturity of soy 

 beans is also briefly discussed, it being pointed out " that the length of time 

 required for maturing this crop was materially shortened by increase of 

 temperature." 



Meteorological data, January 1, 1910, to December 31, 1912 {Virginia Sta. 

 Rpts. 1911-12, pp. 2^8, 259). — Tables are given showing monthly summaries of 

 observations at Blacksburg, Va., on temperature, precipitation, wind, and 

 cloudiness. 



Water supply of the District of Columbia and water power at Great Falls, 

 W. C. Langfitt et al. {U. S. House Representatives, 62. Cong., S. Sess., Doc. 

 IJfOO, p. 153, pis. 64). — This document reports an examination of the water 

 supply of the District of Columbia and the availability of the water power at 

 Great Falls, Potomac River, for supplying light and power. 



Water power of [rivers of the northern half of] Indiana, W. M. Tuckeb 

 {Ind. Dept. Geol. and Nat. Resources Ann. Rpt., 36 {1911), pp. 469-538. figs. 8).— 

 An attempt is made to give a general view, based upon surveys and measure- 

 ment, of the water power conditions and possibilities of the streams and their 

 tributaries in northern Indiana. The water power of this area is considered 

 to be much more valuable than that of the southern part of the State, due to 



