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LIVINGSTONE, David.
Autograph letter, signed, to J. N. Whitaker
Description
3 pages, 8vo, lined paper, detailing the features of the thermometer he used for measuring soil temperature ('...the scale was made of box wood & had a hinge 2 or 3 inches above the bulb...'), with a sketch, explaining the basic requirements of a thermometer to take similar measurements ('...any thermometer which allows separation of the bulb from the case will do...') and suggesting manufacturers, ink slightly faded, remains of mount on final blank.
Bibliography
Stock ID:91187