CONTENTS TO VOLUME XLYIII. 



Number 283. 



Page 



Art. I. — Present Tendencies in Paleontology; by E. W. 



Berry 1 



Art. II. — Comanchean Formations underlying Florida; by 



E. H. Sellards 13 



Art. III. — Studies in the Cyperacese; by T. Holm. XXVII. 

 Notes on Carex podocarpa~R. Br., C. Montane?isis~B&i\., 

 O. venustula Holm, C. Lemmoni W. Boott, and C. cequa 

 Clarke. (With 12 figures drawn from nature by the 

 author) '. 17 



Art. IV — On Atavism and the Law of Irreversibility; by 



Agnes Arber , 27 



Art. V. — On a Possible Limit to Gravitation ; by F. W. 



Very 33 



Art. VI. — Some Problems of the Adirondack Precambrian; 



by H. L. Alling 47 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Arrangement of Electrons in Atoms and Molecules, 

 I. Langmuir, 69. —Qualitative Chemical Analysis, W. W. Scott : 

 The Origin of Spectra, J. J. Thomson, 70. — Absorption of X-Rays, T. E. 

 Auren, 72. — Experimentelle Untersuchungen uber die Beugung elek- 

 tromagnetischer Wellen an einem Schirm mit geradlinigem Rande, M. 

 Sjostrom, 73. — Mechanical Theory of the Vibrations of Bowed Strings 

 and of Musical Instruments of the Violin Family, with Experimental 

 Verification of the Results, part I, C. V. Raman, 74. 



Geology — United States Geological Survey, G. 0. Smith, 75. — Publications of 

 the U. S. Bureau of Mines, Van H. Manning : Iowa Geological Survey, 

 G. F. Kay : Virginia Geological Survey, T. L. Watson, 77.— Geological 

 Survey of Illinois, F. W. DeWolf : North Carolina Geological and 

 Economic Survey, J. H. Pratt : Wisconsin Geological and Natural His- 

 tory Survey, E. A. Birge and W. O. Hotchkiss : Om Skanes Brachiopod- 

 skiffer, G. T. Troedsson, 78. 



Miscellaneous Scientific Intelligence — Equilibrium and Vertigo, I. H. Jones, 79. 



Obituary— W. G. Farlow, 80. 



