14 To CADWALLADER COLDEN. 4 November, 1743 CADWALLADER COLDEN TO W. STRAHAN. Nov. 1743. Remarks on a New Method of Printing. To CADWALLADER COLDEN. 5 April, 1744. Organization of a Philosophical Society WILLIAM STRAHAN TO C. COLDEN. 9 May, 1744. Objections to the proposed New Method of Printing CADWALLADER COLDEN TO B. FRANKLIN. Dec. 1744. Concerning Thoughts on different Species of Mat- An Account of the new-invented Pennsylvanian Fire-places TO CADWALLADER COLDEN. 15 August, 1745. - 70 629 THE WORKS OF BENJAMIN FRANKLIN; CONTAINING SEVERAL POLITICAL AND HISTORICAL TRACTS NOT INCLUDED IN ANY FORMER EDITION, AND MANY LETTERS OFFICIAL AND PRIVATE NOT HITHERTO PUBLISHED; WITH NOTES AND A LIFE OF THE AUTHOR. BY JARED SPARKS. VOLUME VI. BOSTON: CHARLES TAPPAN, PUBLISHER. LOUISVILLE, KY.: ALSTON MYGATT. HARVARD UNIVERSITY Entered according to the act of Congress, in the year one thousand eight hundred and thirty-eight, by HILLIARD, GRAY, AND Co., in the Clerk's Office of the District Court of the District of Massachusetts. CAMBRIDGE: PRINTERS TO THE UNIVERSITY. CONTENTS OF VOLUME SIXTH. Causes of Earthquakes. 15 December, 1737 A Proposal for promoting Useful Knowledge among the TO CADWALLADER COLDEN. 4 November, 1743 CADWALLADER COLDEN TO W. STRAHAN. Nov. 1743. Organization of a Philosophical Society WILLIAM STRAHAN TO C. COLDEN. 9 May, 1744. Objections to the proposed New Method of Printing CADWALLADER COLDEN TO B. FRANKLIN. Dec. 1744. Concerning Thoughts on different Species of Mat- ter. Suggestion for publishing Philosophical Pa- |