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Lloyd, Humphrey (1800-1881) physicist and university administrator
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Autograph letter signed to J.C. Adams

Has not yet received Lloyds' needles and Dip Circle from Mr. Dover. He is putting in hand construction of deflector bars. If all is ready in time the Kew O. can make the observations JCA desires. Will not be time to put Lloyd's deflectors on the Fox circles as they are not yet finished. Forms for entering data have been made.

Whipple, George Mathews (1842-1893) physicist

Autograph letter signed to J.C. Adams

Has begun work on the circles to be supplied to the Arctic Expedition. Description of working methods - not in accordance with Lloyd's instructions.

Whipple, George Mathews (1842-1893) physicist