560 Scientific Intelligence. 



Foundry Sands ; by IIeinrich Ries and J. A. Rosen. Pp. 

 41-85 ; with 3 figures, 5 plates. 



Summary of the Surface Geology of Michigan ; by Alfred C. 

 Lane. Pp. 93-143 ; figures 4-17, 7 plates. 



A Biological Survey of Walnut Lake, Michigan ; by Thomas 

 L. Hankinson. With chapters on the Physiography, Geology 

 and Flora of the Region, by Charles A. Davis ; and a paper 

 on the Aquatic Insects of the Lake, by James G. Needham. 

 Pp. 155-288. 63 plates, 6 figures. 



5. Illinois Geological State Survey. H. Foster Bains, 

 Director. — The Illinois Survey has recently issued Bulletin No. 

 10 on the Mineral Content of Illinois Waters. This has been 

 prepared, in cooperation with the State Water Survey, by Edward 

 Bartow, J. A. Udden, S. W. Parr and George T. Palmer. It 

 gives an account of the Illinois waters, with analyses from many 

 localities. 



Circular No. 5, on the Mineral Production of Illinois in 1908, 

 by R. S. Blatchley, gives the statistics for 1908. It shows that 

 the coal production in Illinois for 1908 was 47,600,000 tons, a 

 decrease of 7 per cent from 1907. The iron production also fell 

 off largely, but in oil there has been a remarkable increase since 

 1904, when there was no record of oil in commercial quantities. 

 Rapid development began in 1906, and in 1908 the production 

 amounted to nearly 34,000,000 barrels; this gives Illinois the 

 third, place among the states of the Union. 



6. History, Geology and Statistics of the Oklahoma Oil and 

 Gas Fields ; by E. R. Perry and L. L. Hutchison. — This brief 

 pamphlet is issued in order to show the present development of 

 the industries named ; a formal report to the Geological Survey 

 is in process of preparation. Although the youngest state in the 

 Union, the oil fields of Oklahoma produced, in 1908, nearly 

 46,000,000 barrels of crude petroleum, more than any of the other 

 states. California comes second, and Illinois, Texas and Ohio 

 follow, while Pennsylvania is seventh in the list. 



7. Les Variations JPeriodiqites des Glaciers, JCIII Rapport, 

 1901 ; par Dr. Ed. Bruckner et E. Muret. Zeitschrift fur 

 Gletscherkunde, vol. iii, 1909. — An examination of glaciers dur- 

 ing 1907 shows the following results: In the Central Alps, one 

 glacier, the Vorab in the Rhine Basin, is increasing; twelve are 

 marked as possibly increasing; one is stationary; four are probably 

 decreasing, and fifty certainly decreasing. In the Eastern Alps, 

 one glacier is probably advancing; one is stationary; twenty-four 

 are in retreat; while the glaciers of the Italian Alps, of Savoie and 

 Dauphine, with one exception show retreat. The only glacier 

 measured in the Pyrenees was found to be stationary. In Norway, 

 the glaciers of Jotunheim show a distinct tendency to elongation. 

 In 1904-05, six were advancing, four were retreating; 1905-06, 

 seven were advancing, seven were retreating; during the years 

 1906-07, fifteen were advancing and only three retreating. 



