TY - JOUR T1 - The Bakerian Lecture: Observations on the Quantity of Horizontal Refraction; With a Method of Measuring the Dip at Sea JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 93 SP - 1 EP - 11 PY - 1803/01/01/ UR - http://dx.doi.org/10.1098/rstl.1803.0001 M3 - doi:10.1098/rstl.1803.0001 AU - Wollaston, W. ER -