Transcriber’s Notes: Underscores “_” before and after a word or phrase indicate _italics_ in the original text. Equal signs “=” before and after a word or phrase indicate =bold= in the original text. Small capitals have been converted to SOLID capitals. Footnotes have been moved so they do not break up paragraphs. Old or antiquated spellings have been preserved. Typographical and punctuation errors have been silently corrected. A NEW SYSTEM OF CHEMICAL PHILOSOPHY. PART FIRST.--VOL. II. REPRODUCED IN FACSIMILIE BY WILLIAM DAWSON & SONS LTD. 102 WIGMORE STREET, LONDON, W.1 AND PRINTED BY HENDERSON & SPALDING SYLVAN GROVE, OLD KENT ROAD, LONDON, S.E.15 THIS EDITION IS LIMITED TO 1,000 COPIES A NEW SYSTEM OF CHEMICAL PHILOSOPHY. _PART FIRST_ OF VOL. II. BY JOHN DALTON, F.R.S. President of the Literary and Philosophical Society, Manchester. Corresponding Member of the Royal Academy of Sciences, Paris, Member of the Royal Academy, Munich, and of the Cæsarean Natural History Society, Moscow; Honorary Member of the Royal Medical Society, Edinburgh, and of the Philosophical Societies of Bristol, Cambridge, Leeds, Sheffield and Yorkshire. Manchester: Printed by the Executors of S. Russell. FOR GEORGE WILSON, ESSEX STREET, STRAND _LONDON_. 1827. TO JOHN SHARPE, ESQ. F. R. S. OF STANMORE, MIDDLESEX, (_Late of Manchester_,) AS A TESTIMONY OF HIS FRIENDLY REGARD, AND OF HIS LIBERAL ENCOURAGEMENT GIVEN TO THE PROMOTION OF CHEMICAL SCIENCE: AND TO PETER EWART, ESQ. _Vice-President of the Literary and Philosophical Society of Manchester_, ON THE SCORE OF FRIENDSHIP, BUT MORE ESPECIALLY FOR THE ABLE EXPOSITION AND EXCELLENT ILLUSTRATIONS OF THE FUNDAMENTAL PRINCIPLES OF MECHANICS, IN HIS ESSAY ON THE MEASURE OF MOVING FORCE,[1] THIS WORK IS RESPECTFULLY INSCRIBED BY _THE AUTHOR_.