حهم METEOROLOGICAL OBSERVATIONS AND ESSAYS. BY JOHN DALTON, D.C.L., F.R.S. PRESIDENT OF THE LITERARY AND PHILOSOPHICAL SOCIETY, MANCHESTER. PHILOSOPHIC CITIES ON MESTOL, CAMBRIDGE, LEEDS, SHEFFIELD AND YORKSHI PREFACE TO THE FIRST EDITION, 1793. WHEN I first adopted the resolution to offer the public, in this manner, the result of my meteorological observations, which was about twelve months ago, my principal design was, to explain the nature of the different instruments used in meteorology, particularly the barometer and thermometer. As the number of these is increasing daily, many of them must fall into hands that are much are much unacquainted with their principles, and may therefore not profit by them in so great a degree as otherwise; for which reason, a short and clear explanation, with a series of observations serving further to illustrate and exemplify the principles, and a few practical rules for judging of the weather, deduced from experience, seemed to me to promise utility; whilst the observab |