1850. Thomas, Cowperthwait & Co. Washington prime meridian.   "Entered according to Act of Congress, in the year 1850, by Thomas, Cowperthwait & Co., in the clerks Office of the Di... Thomas, Cowperthwait & Co. (Philadelphia), 1850.
    
  
Search Results
    
      1850. Thomas, Cowperthwait & Co. (W 97°00ʹ--W 89°07ʹ/N 44°30ʹ--N 39°46ʹ).   Page number in lower right corner: 35.   Differs from other edition (OCLC 78771984): includes Do. propos... Thomas, Cowperthwait & Co. (Philadelphia).
    
  
    
      1850. Thomas, Cowperthwait & Co. Covers the southern third of Manhattan and a small part of Brooklyn.  "References" on two edges of map.  "11."--Upper right margin.  From: A new un... (Philadelphia)S. Augustus Mitchell.
    
  
    
      1850. Thomas, Cowperthwait & Co. Covers the southern third of Manhattan and a small part of Brooklyn.  "References" on two edges of map.  "11."--Upper right margin.  From: A new un... (Philadelphia).
    
  
5. Hindoostan.
    
      1850. Thomas, Cowperthwait & Co. Cartographic Details: Scale approximately 1:9,500,000. Relief shown by hachures."Entered according to act of Congress in the year 1850 by Thomas, C... Thomas, Cowperthwait & Co. ; Philadelphia, Pennsylvania.
    
  
    
      1850. Thomas, Cowperthwait & Co. Relief shown by hachures and spot heights.  Shows counties, the Apache and Comanche Indian areas, the Cross Timbers, roads, and land "explored by L... Thomas, Cowperthwait & Co. (Philadelphia), 185-?.
    
  
    
      1850. Thomas, Cowperthwait & Co. Relief shown by hachures.; Prime meridian: Greenwich.; Includes index to Turkish provinces.; Inset: Environs of Jerusalem.; At top of map: "67." 37... Thomas,  Cowperthwait & Co (Philadelphia), 1850.