TY - JOUR T1 - An Essay upon the Causes of the Different Colours of People in Different Climates; By John Mitchell, M. D. Communicated to the Royal Society by Mr. Peter Collinson, F. R. S. JF - Philosophical Transactions (1683-1775) VL - 43 SP - 102 EP - 150 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1744.0033 M3 - doi:10.1098/rstl.1744.0033 AU - Mitchell, J. AU - Collinson, P. ER -