Letters and Papers on PHILOSOPHICAL SUBJECTS. PART FIRST; COMPRISING PRIVATE LETTERS TO THE TIME OF PART THIRD; COMPRISING Letters, Private AND OFFICIAL, FROM THE BEGinning of the AMERICAN REVOLUTION, TO II. Memoir of Sir John Dalrymple; or a Project of Lord Roch 151 JOURNAL OF THE NEGOTIATION OF THE TREATY OF PEACE, 238 PART THIRD, continued, PART FOURTH; COMPRISING PRIVATE LETTERS FROM THE SUPPLEMENT, . INDEXES. II. Letters written by Franklin to Individuals and Public Bodies, 11. Pennsylvania Fireplace, (Plate V.) 12. Profile of the Pennsylvania Chimney and Fireplace. - Stafford shire Fireplace. (Plate VI.) 13. Magical Squares, (Plate VII.) 14. Magical Circle, (Plate VIII.) 15. Waterspout, (Plate IX.) 104 156 16. Armonica, (Plate X.) 17. Aurora Borealis, &c., (Plate XI.) 18. Improvements in Navigation, (Plate XII.) 19. Chart of the Atlantic Ocean, exhibiting the Course of the 20. Illustrating the Causes and Cure of Smoky Chimneys, (Plate XIV.) 21. Stove for burning Pit-coal, (Plate XV.) 22. Portrait of Mrs. Franklin, Frontispiece, VII. |