TY - JOUR T1 - Extract of Two Letters, the One to Dr. William Gibbons, Fellow of the College of Physitians London; the Other to Mr. Nicholas Staphorst, Operator in Chymistry at Apothecaries.Hall, from Mr. Edward Coles, Giving an Account of a Red Colour Produced by Mixture of a Sulphureous Spirit with a Volatile Alcali JF - Philosophical Transactions (1683-1775) VL - 19 SP - 542 EP - 543 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1695.0093 M3 - doi:10.1098/rstl.1695.0093 AU - Coles, E. ER -