TABLE OF CONTENTS. 



PAGE. 



A revision of the pronouns, . . E dinar d T. Ov^en^ 1 



Ice ramparts, . . . . . E. R. Buckley^ 141 



Discussion, ..... C. R. Van Rise, 158 



The plankton of fresh water lakes, . C. Dvnfjht Marsh, 163 

 An economic and social study of the lead region of Wiscon- 

 sin, Illinois, and Iowa — 

 Introduction, . . . . . 0. G. Libby^ 188 



Ch. I. The lead region of Grant, Iowa, and Lafayette 



Counties, Wisconsin, . . . 0. G. Libby, 191 



Ch. II. The lead region of Grant and Lafayette Counties, 



Wisconsin, ... F. Belle Stanton^ 197 



Ch. III. The lead region of Illinois, Bernard M. Palmer, 208 

 Ch. IV. The lead region of Dubuque County, Iowa, 



Allard J. Smith, 222 

 Appendices, ........ 231 



Spiders of the Phidippus group of the family Attidae, 



George W. Peckham and Elizabeth G. Peckham, 282 

 On the determination of chlorine in natural waters, its ac- 

 curacy and significance, . . Erastus G. Smith 359 

 Household words: their etymology, James Davie Butler^ 366 

 A problem of longevity, . . Charles H. Chandler, 384 

 The Gothenburg method of regulating the liquor traffic, 



1892-8, ..... George Thompson, 387 



Some pseudo-histories of the American Revolution, 



0, G, Libby, 419 



