A CENTURY OF GEOLOGY IN INDIANA. 147 



proof that here in Indiana is made a Portland cement fairly ri\aling: the best 

 foreign brands," a statement which was afterward substantiated by the 

 United States Government, which annually purchased much of the output 

 for use in the arsenal at Rock Island, Illinois. 



In this introductory there are two pages devoted to the Mammoth and 

 Mastodon in Indiana, in which it is stated that the remains of 25 mammoths 

 and 30 mastodons had, up to that date, been found in the State. There are 

 also accounts of the excavations of large pre-historic mounds at Vincennes 

 and Worthington, with descriptions and illustrations of the objects found in 

 them. 



The first Geological map of the State published in or with any of the re- 

 ports was a single page one in connections with this chapter. Of it Collett 

 says: "The outline geological map of the State, printed herewith, is upon so 

 small a scale that it must be regarded as merely a rough sketch. It shows, 

 however, with reasonable accuracy, the surface exposures of the rocks of the 

 several geological formations." 



Following the introduction, there was a report on the Geology of Putnam 

 County by Collett, and of Monroe County by Geo. K. Greene, each with a 

 double page outline map. In the former is given an account of the quarries, 

 then extensively operated for flags, bridge, dimension and rubble stones at 

 PutnamviUe. and located on lands now forming a part of the new "Penal 

 Farm." Collett gives an analysis of the stone and a section of the quarry. 

 Since it is soon to be extensively operated by the State, the following para- 

 graph is quoted from his account: "The product has been in use, severely 

 exposed to the extreme vicissitudes of our variable climate, including changes 

 of 60° of temperature in a single day, for over forty years It has shown 

 capacity to resist the action of frosts, fire and ice. Samples, taken as a rule, 

 from the exposed parts of the quarry when first opened in 1838-'40, may be 

 seen in piers, etc., of the bridges and culverts on the National road and in 

 the locks of the canal, the steps of the mother and branch Banks of State, at 

 Indianapolis, and also the steps of the Terre Haute House at Terre Haute, 

 and of the old University Building at Greencastle. As pavement, step stones, 

 and for curbs it is unrivaled. Its quality of hardness renders it desirable for 

 piers and rip-raps exposed to the action of ice and waves." 



A "Synopsis of the Molluscous Fauna of Indiana," by Dr. Frederick 

 Stein of Indianapolis follows the report on Monroe County. It gives the 

 names and distribution in the State of 181 species of land and fresh water 

 shells, and was the only cheek list of the MoUusca of the State available until 

 the one prepared by L. E. Daniels was published in 1903.* 



The final paper in the volume is one on Paleontology by Dr. C. A. White 

 of the Smithsonian Institution, and is entitled "Fossils of the Indiana Rocks." 

 It includes full descriptions, accompanied by 11 plates of figures, of a few 



'27th Rep Indiana Dept. Geol. & Nat. Resources, 1903, pp. 629-652. 



