12 DAVENPORT ACADKMY ()F NATURAL SCIENCES. 



92. Mason, Otis T. American Naturalist, 1878 (xii.). 



Announces discovery of tablet, and suggests caution (|). 322), 

 to which Mr. J. D. Putnam repHes (p. 400) that there can be 

 no room for fraud. 



93. Materiaux pour l'Histoire de l'Homme. 1S87. 



Refers to mounds near Clayton. 



94. McGee, W. J. Am. Jour. Sci. and Arts, ser. iii., vol. xvi., p. 272. 



"Artificial Mounds in North-eastern Iowa, and the Evidence of 

 the Employment of a Unit of Measurement in Their Con- 

 struction." Six-page article on Metrology. 



95. American Antiquarian, iii., 194. 



'• Inductive Metrology." Compares his notes and methods with 

 Petrie's, as given in Petrie's book of above title. Arrives at 

 similar conclusions. 



96. Am. Jour. Sci. and Arts, ser. iii., vol. xvi., p. 458. 



" On an Anatomical Peculiarity by which the Crania of 

 Mound-Builders may be distinguished from those of Mod- 

 ern Indians." 



97. MouLTON, M. W. Smithsonian R.., 1877, 250. 



" Mounds in Delaware County." Groups of mounds and 

 earthworks forming nearly a hollow square. 



98. Myers, Justus M. T. History of Lee County, pp. 427-428. 



Mounds described. In one thirty-two skeletons seated in 

 vaults of limestone slabs. 



99. Murdoch, Samuel. Iowa Historical Record, ii., p. 356. 



"The Mound-Builders of the Mississippi Valley." General dis- 

 cussion to prove Mound-Builders ancient, extinct, and can- 

 nibal. 



100. Iowa Historical Record, 1888, pp. 28-32. 



Mounds long and round. The former older. Two races of 

 builders ; the later with conical skulls. 



