Account of some observations tending to investigate the construction of the heavens. By William Herschel, Esq. F.R.S. Read at the Royal Society, June 17, 1784.

London : printed by J. Nichols, MDCCLXXXIV. [1784]

17,[1]p.,plates ; 40.

ESTC N2638

Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. (Eighteenth century collections online). Available via the World Wide Web. Access limited by licensing agreements.