METEOROLOGY AVATEE. 27 



No. 6. — The Drought of 1910-11 in North-Central Georgia and the Chatta- 

 hooche River Basin, by C. F. von Herrmann ; The Erosion of Sioux Point. South 

 Dalvota, by G. W. McDowall ; Floods of the Upper Missouri River (illus.), by C. D. 

 Reed; The Drought in the Ozarks of Southwestern Missouri in 1911, by J. S. 

 Hazen ; Notes on the Wind ]\Iovement at Point Reyes Light During June, 1911, 

 by J. Jones; Notes on the Rivers of the Sacramento and San Joaquin Water- 

 sheds for June. 1911, by H. J. Andree; and Duty of Water Investigation in 

 Idaho, by D. H. Bark. 



No. 7. — The Drought of 1911 in North Carolina, by L. A. Denson ; Floods of 

 the Rio Grande and of the Rio Pecos, by F. H. Brandenburg; A Violent Local 

 Storm at Abilene, Tex., by W. H. Green ; Precipitation Averages for Large Areas 

 (illus.), by A. H. Thiessen ; Note on Earthquake of July 1, 1911, at Mount 

 Hamilton, by R. G. Aitken ; Notes on the Rivers of the Sacramento and San 

 Joaquin Watersheds, by N. R. Taylor; and Precipitation and Altitude in the 

 Sierra (illus.), by C. H. Lee. 



Bulletin of the Mount Weather Observatory ( U. S. Dept. Agr., Bid. Mount 

 Weather Obsen:, .', (1911), pt. 2, pp. 25-102, figs. 28, charts 6).— This number 

 contains the following articles: Summary of the Free Air Data at Mount 

 Weather for the Three Years, July 1, 1907, to June 30, 1910 (illus.), by W. R. 

 Blair: and Free Air Data at Mount Weather for January, February, and 

 March, 1911 (illus.), by W. R. Blair. 



Surface water supply of the North Atlantic coast, 1909, H. K. Bareows, 

 C. C. Covert, and R. H. Bolster (U. 8. Geol. Survey, Water-Supply Paper 261, 

 pp. 309, pis. 5, fig. 1). — Measurements of flow of water in streams* of the prin- 

 cipal drainage basins from the St. John River in Maine to the Rappahannock 

 River in Virginia are recorded in this bulletin. 



Surface water supply of the Colorado River basin, 1909, W. B. Freeman 

 and R. L. Bolster (U. S. Geol. Survey, Water-Supply Paper 269, pp. 2-'f7, pis. 9, 

 fig. 1). — Measurements of stream flow of the Colorado River and its tribu- 

 taries are reported in detail. 



Surface water supply of the North Pacific coast, 1909, J. C. Stevens, E. C. 

 LaRue, and F. F. Hensiiaw (U. S. Geol. Survey, Water-Supply Paper 272, 

 pp. 521, pis. 8). — Measurements of flow of water in the principal streams of 

 the drainage basins north of the California state line are reported, with de- 

 scriptions of the drainage basins. 



The movements of the subsoil water in Upper Egypt, H. T. Ferrar (Sur- 

 vey Dept., Egypt, Paper 19, pp. VI-\-74, pis. 37, fig. i).— A continuation of sys- 

 tematic studies of the fluctuations of the level of ground water in the Nile 

 Valley (E. S. R., 22, p. 616; 24, p. 216) as affected by irrigation and Nile 

 floods is here reported. 



The author concludes that in perennially irrigated lands of Upper Egypt the 

 water level has probal^ly been temporarily raised 4 ft. As regards ground- 

 water conditions he divides the area studied into three zones parallel to the 

 several reaches of the river and shows that in the zone nearest the river the 

 fluctuation in the level of the ground water is inversely proportional to the 

 distance from the river. In the so-called basin zone, further removed from the 

 river, the water levels rise and fall as if actuated by an annual tide. " They 

 begin to rise some 45 days after the flood has reached Egypt and attain a 

 maximum after the crest of the flood has passed." The movement of ground 

 water in the desert zone has not been definitely determined. " In our so-called 

 riverain zone, the water moves at the rate of 1.50 meters per day at one period 

 of the year, and at other seasons, namely, when the water table is stationary, 

 it is practically stagnant. The water in the basin zone would seem to have a 



