Anthracite has been mined from the Narragansett Basin of Rhode Island and Massachusetts sporadically, and with limited success, for more than 170 years. Beginning in 1974, interest in the coal of the basin was renewed because of increasing prices and supply uncertainties involving pertroleum products. During 1974-77 the Bureau of Mines analyzed 28 samples of basin coals and conducted washing tests on 20 of them. Results, reported herein, indicate that the coals are low-sulfur, moderate- to high-ash anthracites and semianthracites, suitable for physical preparation to a product generally containing less than 10 percent ash. Additional exploration, sampling and testing will be required to permit appraisal of the potential value of the Narragansett Basin coal resources.