CONTENTS TO VOLUME 11. 



NLimlber 7 



Page 

 Art. I. — Relation of Isostasy to Uplift and Subsidence; by 

 W. Bowie 1 



Aet. II. — New Amynodonts in the Marsh Collection ; by E. L. 



Troxell 21 



Art. III. — New Species of Hyracodon; by E. L. Troxell . . 34 



Art. IY. — Csenopus, the Ancestral Rhinoceros ; by E. L. 

 Troxell 41 



SCIENTIFIC INTELLIGENCE 



Chemistry and Physics. — A Eecalculation of the Atomic Weights, F. W- 

 Claeke, 51. — The Fundamental Processes of Dye Chemistry, H. E. 

 FiERZ- David: Organic Chemistry for the Laboratory, W. A. Noyes: Quali- 

 tative Chemical Analysis, M. C. Sneed, 52. — Factory Chemistry, W. H. 

 Hawkes, 53. — Neon Lamps for Stroboscopic Work, F. W. Ashton, 54. — 

 Harmonics in the Siren, E. A. Milne and R, H. Fowler, 55. — An Intro- 

 duction to Technical Electricity, S. G. Starling, 56. 



Geology. — Thirteenth Annual Eeport, Floidda State Geological Survey, H. 

 GuNTER, 56. — The Fossil Crinoid Genus Dolatocrinus and its Allies, F. 

 Springer; A Contribution to the Description of the Fauna of the Trenton 

 Group, P. E. Raymond: The Genesee Conodonts, with Descriptions of New 

 Species, W. L. Bryant: The Trigoniae from the Pacific Coast of North 

 America, F. L. Packard, 57. — Iowa Geological Survey, Annual Report, 

 1916: Ninth Biennial Report of the Commissioners of the Connecticut 

 Geological Survey, H. E. Gregory: The Tin Resources of the British 

 Empire, N. M. Penzer, 58. 



Miscellaneous Scientific Intelligence. — Symbiosis, A Socio-Physiological Study 

 of Evolution, H. Reinheimer: Die Mneme als erhaltendes Prinzip im 

 Wechsel des organischen Geschehens, R. Semon: Bibliotheca Chemica- 

 Mathematica, 59. — Bibliotheca Zoologica II, 0. Taschenberg: Annual 

 Report of the Field Museum of Natural History for the year 1920, D. C. 

 Davies, 60. 



Obituary.— E. B. Rosa, 60. 



