Table of Contents. v 



The range and distribution of the Lower Silurian fauna of Minneso- 

 ta with descriptions of some new species, with plates, IV, V and 



VI, F. W. Sardeson, 326 



Contributions from the Chemical Laboratory of the University 

 of Minnesota : 



Analysis of a sample of Mankato cement rock, by W. C. Smith, 344 

 Analysis of a marl from near Gladstone, Mich., by Peter 



Christianson, -----_ 34.4 



Analysis of a sample of water from "The Giant Spring," Mon- 

 tana, by J. A. Dodge, ------ 345 



Analysis of a sample of water from an artesian well at Devil's 



Lake, North Dakota, by J. A. Dodge, - - - 345 



Analyses of seven samples of efflorescence found on red pressed 



brick, by C. F. Sidener, . - . - 346 



A pre-historic Indian village, by F. W. Pettigrew, with Plate VII, 348 

 The growth-periodicity of the potato tuber, by Conway Mac- 



MiLLAN, -.-.---- 355 



Preliminary notes on the epinasty and hyponasty of Raphanus coty- 

 ledons by E. P. Sheldon, _ . - . - 362 

 Artesian wells in North and South Dakota, by Warren Upham, - 370 

 The geology of the artesian basin of South Dakota, by D. S. Mc- 



Caslin, -.-.-,--. 380 



Sources of the constituents of Minnesota soils, by C. W. Hall, - 388 

 Descriptions of Plates, ----- 408, 410, 412, 414 



Index - - - - - - - - - 415 



ILLUSTRATIONS. 



PLATES. 



Plate I. Fig. 1, Building stone, Minneapolis; Fig. 2, Contact zone ; Fig. 

 3, Normal building stone ; Fig. 4, Argillaceous bands ; Fig. 5, Upper 

 part of Magnesian; Fig. 6, Upper part of layer No, 4, West Hotel. 



Plate 11. Figs. 1-12 inclusive, Profiles of artesian wells in southeastern 

 Minnesota ; Fig. 13, Generalized section across southeastern Minne- 

 sota. 



Plate III. Fig. 1, Map of Central Wisconsin ; Fig. 2, Profile along Wis- 

 consin river ; Fig. 3, Altered gabbro; Fig. 4, Microcline matrix; Fig. 5, 

 Corroded plagioclase ; Fig. 6, Thin section of gneissic rock. 



Plate IV. Figs. 1-39 inclusive, of Paleozoic fossils. 



Plate V. Figs. 1-24 inclusive, of Paleozoic fossils. 



Plate VI. Figs. 1-26 inclusive, of Paleozoic fossils. 



Plate VII. Figs. 1-15 inclusive, Map of pre-historic Indian village and 

 various articles exhumed. 



FIGURES. 

 Figure 1, p. 86, A pre-historic stone dam across Pike river. 

 Figure 2, p. 117, Section of Lower Silurian at a Minneapolis quarry. 



