Experiments and Observations tending to illustrate the Nature and Properties of Electricity. In one letter to Martin Folkes, Esq; President, and two to the Royal Society.

8vo, 1 leaf, pp. viii, (3)?59. Blue sugar-paper wrappers. Fine copy. FIRST SEPARATE EDITION of the first electrical publication of the scientist whom Priestley described as ?the most active and interested person in the kingdom in everything related to electricity.? Watson was the first to observe the flash of light attending the discharge of a Leyden jar, and he provided the first demonstration of the passage of electricity through a vacuum, and the plus and minus of electricity. Second and third editions, and a Sequel to the Experiments, all appeared in the same year. Ekelöf 294 (third edition). Wheeler Gift 333 (third edition).