Physics.
Enfield, William.
Institutes of natural philosophy. London: J. Johnson. 1785. xii, 353 pp. 11 folded plates. 4°, *3962.2
Same. 2d edition, with corrections and con- siderable additions; added, an introduction to the first principles of chemistry. London: J. Johnson. 1799. vi, 428 pp. 13 folded pl. 4°, 3961.51
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