July 14, 1916] 



SCIENCE 



69 



ning out, the Burlington limestone, which immedi- 

 ately succeeds the Chouteau limestone at the orig- 

 inal locality is, on the Mississippi River, made to 

 rest unconf ormably upon the older Hannibal shales. 

 Cirque Phenomena in British Columbia: Charles 



Keyes. 



From the banks of the Skeena River, which flows 

 into the Pacific ocean a few miles below the south- 

 ernmost point of Alaska, the coast ranges rise 

 abruptly to elevations of 3,000 to 4,000 feet. The 

 snow-line is here sufficiently low to render it easily 

 accessible. Cirque phenomena are developed to a 

 wonderful extent. Perhaps nowhere else in all the 

 world are the various phases so well displayed. 

 The glaciers are in all stages of disappearance, so 

 that on every hand their work is left open to the 

 most detailed scrutiny. Even from the railway 

 train many of the different aspects are easily 

 viewed. For a distance of more than 100 miles the 

 rail journey is interruptedly in the midst of clearly 

 observable cirque phenomena. In few places on 

 the globe are all the details corroborating the 

 Johnson hypothesis of cirque formation so well laid 

 bare. 

 The Lithogenesis of the Sediments: P. M. Van 



Tuyl. 



There are few lines of investigation in geology 

 which promise more fruitful returns than the 

 lithogenesis of the sediments. The importance of 

 careful study of recent sedimentary deposits both 

 of the continental and marine type as a basis for 

 interpreting the history of the ancient sediments 

 can not be too strongly emphasized, as was pointed 

 out recently by Andree. Indeed, some of the great- 

 est contributions to stratigraphy have already come 

 through such studies. 



It is believed that more careful and systematic 

 examination of the sediments with the aid of the 

 microscope would aid greatly in interpreting the 

 conditions of their deposition as well as the nature 

 of their source. Here lies a great field almost un- 

 touched, although its possibilities have been shown 

 by the studies of Sorby, Cayeux, Mackie, Rogers, 

 Goldman and others. 

 The Western Interior Geosyncline and its Bearing 



on the Origin and Distribution of the Coal Meas- 

 ures: P. M. Van Tuyl. 

 Some New Niagaran Corals from Monticello, Iowa : 



A. O. Thomas. 



The coral reef near Monticello is rich in the more 

 common species of Niagaran corals. Careful col- 

 lecting extending over a number of years has re- 

 sulted in the discovery of a few new and instructive 

 species. Among them are several commensals ex- 



hibiting some interesting relations. Descriptions 

 and illustrations. 



A Highly Alate Specimen of Atrypa Reticularis 



(Linne) : A. O. Thomas. 



Specimens of Atrypa reticularis preserving the 

 fragile excrescences about the margins of the shell 

 are uncommon. A fine specimen from the Devonian 

 at Independence, Iowa, illustrates this feature bet- 

 ter than any figured in the literature at present, as 

 far as known. 



The Effect of Temperature upon the Elasticity of 

 Tungsten: H. L. Dodge. 



On the Variation of the Reflecting Power of Iso- 

 lated Crystals of Selenium with the Azimuth of 

 the Incident Polarized Light: L. P. Sieg. 



A Physical Representation of the Summation of 

 Certain Types of Series: L. P. Sieg. 



A Study of Some of the Torsional Elastic Proper- 

 ties of Phosphor-Bronze Wires: A. J. Oehleb, 

 introduced by L. P. Sieg. 



An Electrical Apparatus for securing and main- 

 taining Constant High Temperatures: W. E. 

 Tisdale. 



The Tungsten X-Ray Spectrum: Elmer Dershem. 



Why Hot-Water Pipes in Household Plumbing 

 burst more frequently than Cold Water Pipes: 

 P. C. Brown and Waldemar Noll. 



A Bibliography of the Literature bearing on the 

 Light Sensitiveness of Selenium and a Statement 

 of Outstanding Problems: P. C. Brown. 



A Curve of Moisture Condensation on Glass Wool: 

 L. E. Dodd. 



The Stroboscopic Effect by Direct Reflection of 

 Light from Vibrating Membranes: L. E. Dodd. 



A New Tonoscope: L. E. Dodd. 



Certain Conclusions in Regard to Audition: G. W. 

 Stewart. 



A New Method of Identification of Polarized Light 

 Reflected from Small Opaque Crystals: LeRoy 

 D. Weld. 



A Sheep's Brain without a Corpus Callosum, a 

 Demonstration: H. A. Scullen. 



Recent Theories of Heredity in relation to the 

 Theory of Natural Selection: C. C. Nutting. 

 The paper discusses briefly the theories of Weis- 



mann, Mendel, de Vries and Bateson with the defi- 

 nite contribution of each to our knowledge of 



heredity, together with its net result as affecting 



our attitude towards natural selection. 



Trophospongium of Crayfish Nerve Cell (illus- 

 trated) : L. S. Ross. 



