84 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



town boundaries. The geological boundaries are shown by dotted lines. 

 The Secondary formations are separated from the Primary, and the 

 divisions of the Primary are indicated by numbers, by Roman and 

 Greek letters, and by various other characters. The trap of the 

 Secondary and of the Primary are indicated, even to the small dikes. 

 Scale approximately i inch ^5^/2 miles. 



(Considering the base map used and the area covered, probably no 

 more accurate piece of geological mapping has ever been ■ accomplished 

 by a single individual. — Ed.) 



579. Petros (C. A. Lee). 



Map of two lakes, Salisbury. 

 Am. Jour. Sci., (i) v, 34-37, 1822. 



Map of two lakes (Northeast and Little ponds) ; showing islands, 

 swamp lands, moving bowlders. 



580. Putnam, B. T. 



Map showing location of iron mines east of the Hudson 

 river. 



Census of U. S., loth Rept., xv, fig. 8, p. 83, 1886. 



The map covers a portion of Litchfield county; southwestern por- 

 tion of Berkshire county, Massachusetts, and Dutchess and Columbia 

 counties. New York. Shows one mine in Connecticut, that in Kent. 

 Scale I inch=:i mile. 



581. Pynchon, W. H. C. 



Map of the northwestern corner of Connecticut. 



Connecticut Quart., v, 279, 1899. 



Includes towns of Salisbury, Canaan, North Canaan, Sharon, and 

 Cornwall. Shows topographic features and location of iron mines and 

 furnaces. 



582. Rice, William North. 



Maps of Triassic areas. 



Connecticut Board of Agric, Rept. for 1903, 98, 107, 

 1904. 



•One map of western Connecticut and Massachusetts, showing Trias- 

 sic; another of trap areas in the vicinity of Hartford, Middletown, and 

 Meriden. 



582a. Rice, W. N., and Gregory, H. E. 



Maps and diagrams illustrating Connecticut geology. 

 Connecticut State Geol.- and Nat. Hist. Surv., Bull. 

 No. 6. 



Figure i. Geological map of central Connecticut. Highland and 

 lowland distinguished. Scale 1 inchi=io miles. Plate xiv. Preliminary 

 geological map of Connecticut. A simplified edition of 539a. Scale i 

 inch 1=6 miles. Plate xv. Triassic areas of eastern North America. 

 Scale approximately i inch ^120 miles. Plate xxiv. Map showing 

 trap sheets and faults in central part of Triassic area of Connecticut. 

 A clearly drawn map in black and white, slightly altered from Davis, 

 527. Scale I inch^2 miles. Figure 15. Sketch map showing faults 

 near East Berlin. Scale i inch=ri2oo feet. Figure 17. Relations of 



