1. Map of the United States showing the distribution of the lines of mean annual temperature : prepared to illustrate the corresponding distribution of the population at the date of the Tenth Census Maps Pennsylvania State University Public content 1880. Gannett, Henry, 1846-1914. Scale [ca. 1:12,000,000]; 1 map: color, mounted on linen; 26 x 41 cm Atmospheric temperature--United States--Maps. [Census Bureau].