REVIEWS 483 



state, together with six plates illustrating characteristic fossils of the various 

 formations. A new and well-executed geological and soil map of the state 

 is also included. Part II gives an account of the exhibits made by the 

 Survey at recent expositions. The remaining half of the volume comprises 

 reports on highways and highway construction, and an historical account 

 of the counties and election districts. H. H. 



Congrhs geologique international. Compte rendu de la dixieme session, 

 Mexico, 1906. Imprenta y fototipia de la Secretaria de Fomento, 

 Mexico, 1907. 

 The report of this session is in two large volumes, containing 1,350 

 pages and 52 plates. Besides the lists of members, minutes of the meetings, 

 accounts of the excursions taken, etc., 46 papers communicated to the 

 Congress are printed in full. The chief topics discussed are those relating 

 to earthquake and volcanic phenomena and to geological climates. Those 

 relating to the latter subject are: " Interglacial Periods in Canada," by 

 A. P. Coleman; "Glaciation in Lower Cambrian Time" and "Conditions 

 of Climate at Different Geological Epochs," by T. W. E. David; "Ueber 

 die Klima-Aenderungen der geologischen Vergangenheit," by F. Freeh; 

 "Climatic Variations," by J. W. Gregory; "The Causes of the Glacial 

 Epoch," by E. W. Hilgard; "Le climate de I'Afrique du Nord pendant le 

 Pliocene superieur et le Pleistocene," by L. de Lamothe; and "Chmats des 

 temps geologiques," by M. Manson. Among the papers on ore deposits 

 may be mentioned: "Ore Deposits at the Contacts of Intrusive Rocks and 

 Limestones," by J. F. Kemp; "The Relation of Ore-Deposition to Physical 

 Conditions," by W, Lindgren; and "Some Relations of Paleogeography 

 to Ore Deposition," by H. F. Bain. v H. H. 



Water Resources of the East St. Louis District. By Isaiah Bowman 



AND Chester A. Reeds. Illinois State Geological Survey, 



Bulletin No. 5. Urbana, 1907. 



This publication of the young and vigorous Illinois Geological Survey 



will prove of great value to the numerous manufacturing interests of a 



district which, though in close proximity to the Mississippi River, has 



always found the problem of an adequate water supply a difi&cult one. 



H. H. 



