TY - JOUR T1 - A Letter from Mr. J. Smeaton to Mr. John Ellicott, F. R. S. concerning Some Improvements Made by Himself in the Air-Pump JF - Philosophical Transactions (1683-1775) VL - 47 SP - 415 EP - 428 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1751.0070 M3 - doi:10.1098/rstl.1751.0070 AU - Smeaton, J. ER -