116 EXPERIMENT STATION RECORD. 



given of observations during: 1910 at East Lansing. Mich., on temperature, pres- 

 sure, precipitation, cloudiness, wind movement, etc. 



The climate of Prince George's County, W. H. Alexander (In The Physical 

 Features of Prince George's County. Baltimore: Md. Geol. Survey, 1911, pp. 

 185-206, flg. 1). — The available data regarding temperature and precipitation are 

 summarized. The average annual temperature is 54° F.. the annual precipitation 

 42 in. 



Cold air drainage, F. Shreve {Plant World, 15 (1912), No. 5, pp. 110-115, 

 flg. 1). — Temperature observations on and near the flood plain of the Santa Cruz 

 River, and at different elevations (ridge and canyon) in the Santa Catalina 

 Mountains up to 8.000 ft., indicated the flow of a shallow stream of cold air 

 down the canyon, constituting an important factor in the limitation of the 

 upward distribution of desert species of plants. "A number of the most conspicii- 

 ous desert species range to much higher altitudes on ridges and the higher slopes 

 of canyons than they do in the bottoms and lower slopes of canyons. Samples 

 secured by the writer indicate that there is no essential difference between the 

 soil moisture of ridges and the bottoms of canyons during the driest portions 

 of the j^ear. Neither is tliere any evidence that desert species would fail to 

 survive in the canyon bottoms if they were somewhat higher in soil moisture 

 content. An explanation of the absence of the desert species from canyon 

 bottoms and their occurrence at higher elevations on ridges must be sought in 

 some operation of the chimenal factors rather than in the factors of soil and 

 atmospheric moisture." 



The relation between the amount of rainfall and of seepage, Luedecke 

 {^eparaic from Kiilturtechniker [Breslau], pp. 11, pis. 6, flgs. 3). — This is a 

 detailed account of the work and observations with rain and with percolation 

 gages as carried out by Latham in England (E. S. R., 22, p. 15). 



Water resources of the Penobscot River basin, Maine, H. K. Barkows and 

 C. C. Babb ( U. S. Geol. Survey, Water-Supply Paper 279, pp. 285, pis. 19, flgs. 5).— 

 This paper is " compiled chiefly from the records, reports, and maps of the United 

 States Geological Survey and from the results of surveys made in cooiDeration 

 with the Maine State Survey Commission. The report includes all data on 

 precipitation, stream flow, water storage, and water power that were available 

 at the end of the calendar year 1909 and is accompanied by plans and profilea 

 of the principal rivers, lakes, and ponds in the basin. It contains also a gaz- 

 etteer of the water features in the Penobscot basin, by Gertrude E. Schulz." 



Surface water supply of the south Atlantic coast and eastern Gulf of 

 Mexico, 1910, M. R. Hall and J. G. Mathers (Z7. S. Geol. Survey, Watcr- 

 Suipply Pamper 282, pp. 109, pis. 3). — This paiier "contains descriptions of the 

 two drainage basins named and the results of stream measurements in them, 

 namely, gage-height records, results of current-metor measurements, and daily 

 and monthly discharges." 



Surface water supply of Hudson Bay and Upper Mississippi River basins, 

 1910, R. FoLLANSBEE, A. H. HoRTON, and G. C. Stevens {U. S. Geol. Survey, 

 Water-Snpply Paper 285, pp. 318, pis. //). — Data corresponding to the above are 

 reported for the Hudson Bay and Upper INIississippi River basins. 



Gaging stations maintained by the United States Geological Survey 1888- 

 1910 and Survey publications relating to water resources, B. D. Wood (U. S. 

 Geol. Surrey, Water-Supply Paper 280, pp. 102). — The list of gaging stations is 

 arranged according to drainage basins and the publications chronologically, 

 but with a finding list arranged alphabetically by States. There is also an index 

 of authors and of streams. 



Analyses of artesian and subartesian waters, New South Wales, J. C. H. 

 MiNGAYE and H. P. White (Rpt. Dept. Pub. Works N. 8. Wales, 1911, pp. 

 J^S-SIf). — Mineral analyses of a large number of samples are tabulated. 



