*i CONTENTS; . 



' S 29. Specific Gravity - page 220 



30. Examination hy the Mug net - 2.21 



31. Real Utility of external and pbyfical 

 Marks - ibid. 



32. Nature of Fojpts difcoverable by the 

 sHdofCbemiflry - - 222 



33. neir Char after in Fire - ibid. 



34. life of the Biw-pipe in Oryctohgy 223 

 35 A/o/? of the Principles of FoJJils are dif- 



covered by Fire - - ibid* 



36. But not every Principle - ibid. 



37. Why Iirveftigatfati by Fire is fome times 

 falaci'jits - - ibid. 



38. The Efficacy of Fire cannot be defined 

 with any Accuracy - 224 



39. And it is variable alfo - ibid. 



40. Does not determine the Proportion of the 

 Principles - - 225 



4 1 . Merit of Cronftedt - 225 



42. The btjl Method f*f examining FoJJils in 



the burn id IV ay - - 225 



43. The Difficulty of founding a Syftem of 

 FoJJils - - 226 



44. Internal and external Characters 226 



CLASSES of FOSSILS. 



45. Enumeration of the Claffes - 227 



46. Order ... 

 47.. Di/lingui/hing Marks of each Chifs 



