Isothermal Chart, or View of Climates & Production, Drawn from the Accounts of Humboldt & Others (Historical Map)

Isothermal Chart, or View of Climates & Production, Drawn from the Accounts of Humboldt & Others

First world isothermal chart. Woodbridge notes that the figures on the chart indicate mean annual temperature of the places depicted. The dotted lines crossing the chart point out the places which have equal degrees of heat. Theres form the boundaries of the Regions distinguished by color.

What is also interesting about this map is that it appears to also be a planting calendar, suggesting what crops are best suited for each Region. These are depicted by the unbroken vertical lines reaching from each of the dotted Regional lines.

W.C. Woodbridge

From Woodbridge’s School Atlas to Accompany Woodbridge’s Rudiments of Geography: Atlas on a New Plan

Hartford, Conn.: Oliver D. Cooke & Co., [1823])

January 13, 1823

Engraved map, with added color, 20.3 × 28.2 cm, scale not given

English

World

W.C. Woodbridge

Map part of Woodbridge’s School Atlas to Accompany Woodbridge’s Rudiments of Geography: Atlas on a New Pla

[Graphic Arts Collection].

Hartford, Conn.: Oliver D. Cooke & Co., [1823])

January 13, 1823