Espy James Pollard

Es·py

(ĕs′pē), James Pollard 1785-1860.
American meteorologist who is credited with the first correct explanation of the role heat plays in cloud formation and growth. He also developed the use of the telegraph for assembling meteorological observations and tracking storms.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.