tiii CONTENT S. 



76. Red ft us why Terra Ponder of a ought to 



be a dijlincl Genus - P* l c .246 



77. Five Genera Jbould be CQnflitvtfd of the 



five primitive Earths - 247 



78. Exceptions. >*,r - 248 



79. Compound Earths are not united me- 

 chanically only - - 249 



So. Centra of ' Metals - ibid. 



1 1 , Increafcd within a few years ibid. 



82. Arrangement of mixed Metals 250 



83. Genera of pbhgijtic Bodies - 251 



84. Sulphur - 252 



85. Petroleum - -> ibid. 



86. Amber - - ibid. 



87. Diamond - ibid. 



88. Pyrites and Molybdena do not conjli- 

 tute peculiar Genera - - 253 



89. Properly fpeaking there is but one Ge- 

 nus ufPbfogiftU Subftancet - ibid. 



90. F'u'Ji slppendi\ - - ibid, 

 yi. Four Genera of Foffilf mixed mechani- 

 cally - - 254 



fj2. Fifjl Genus - ibid. 



93. Second Genus - ibid. 



<j.\. '1'hird Genus - - 255 



*)5 Fourth Genus - - ibid. 



96. 'DiJFinct a 'id mixed Par ticks of FoJ)Us ibid. 

 1/7. F'Atr Genera of organic FoJJils 256 



cj8. /'V^ Genus ofdon/ledt - /A/V/. 



99. ^';i r ^'V tiodiif mineralized by Salts />/V/. 



ico. 



