xii CONTENTS. 



of meteorites, 114, 115. Objections to Sorby's view that minerals of unlike spe- 

 cific gravity can intercrystallize, 115. Objections to Helmholtz's theory that tlio 

 Earth is composed of meteoric fragments, 115, 116. Boulders in Northern Drift, 

 fallen Meteorites, IIG. Unscientific to suppose Meteorites have brought germs 

 of life to the Earth, 116. Destruction of germs by the cold of space, 116. 

 Meteorites not exposed to action of water and air, 116. Meteorites not vein for- 

 mations, 117. Source of metals in veins, 117. Cojtper in Meteoric Hocks and 

 Terrestrial Basic ones, 117. Metallic Iron in Terrestrial Basic Rocks, 117. 

 Nickel, etc. in Meteoric and Terrestrial Masses, 118. 



SECTION IV. 



The Terrestrial Peridotites 118-162 



Variety. — Dunite, 118-125. 

 Franklin, North Carolina, 118; structure indicates eruptive origin, 118. 

 Webster, North Carolina, and alterations in, 119, 120. Tafjord, Norway, 120. 

 Dun Mountain, New Zealand, 121. Sondraore, Norway, 121. Eol)crgvik, Nor- 

 way, 121. Bonhomme, France, 121, 122. Karlstiitten, Austria, 122. Tron, Nor- 

 way, 122. Heiersdorf, Saxony, 122. Ronda Mountains, Spain, 122, 123, Serrania 

 de Ronda, Spain, 123. St. Paul's Rocks, their origin and alterations, 123-125. 



Variety. — Saxonite, 125-128. 

 Russdorf, Saxony, 125. Northern Norway, 125, 126. Thorsvig, Norway, 126. 

 Birkedal, Norway, 126. Hovenden, Norway, 126. Rodfjeld, Norway, 126. 

 Andestad See, Norway, 126, 127. Langenberg, Saxony, 127. Callenberg, 

 Saxony, 127. The Ziegelei, Saxony, 127. Fatu Luka, Timor, 127. Rofna, Alps, 

 127, 128. 



Variety. — Lherzolite, 128-147. 



Lake Lherz, France, 128, 129. Serrania do Ronda, Spain, 129. Italy, 129. 

 Ultenthal, Tyrol, 129. Colusa Co., California, 129-132; alteration structure in, 

 taken for stratification, 130. Inyo Co., California, 132. Production of INlagnetite 

 during alteration, 132. Mohsdorf, Saxony, 132, 133. Rodhaug, Norway, 133. 

 Baste, Harz, 133, 134. Christiania, Norway, 134. Gjprud, Norway, 135. Presque 

 Isle, Michigan. 136-138. Formation of dolomitic rocks, 137, 138. Eruptive 

 origin of this Peridotite, 138. Ishpeming, Michigan, 139. Dolomitic rocks, 139. 

 Transylvania, Austria, 139, 140. Fichtelgebirge, Bavaria, 140. Jaina River, 

 San Domingo, 140. Starkenbach, France, 140. Todtmoos, Baden, 141. Plumas 

 Co., California, 142, Levanto, Italy, 142. Euboea, 142. Philippine Islands, 

 143. Lizard District, Cornwall, 143. Troad, Asia Minor, 143-147. Dikes of 

 Serpentine, 144. Diallage with Cleavage of Augite, 145. Schistose Rocks and 

 their origin, 146, 147. 



Variety. — Eulysite, 147-149. 



Tunaberg, Norway, 147. Kettilsfjall, Sweden, 147, 148. Varallo, Scsia Valley, 

 148. Lc])ce, Austria, 148. Fontanapass, Greece, 148. Mohsdorf, Saxony, 148. 

 Gillsbcrg, Saxony, 148, 149. /• 



Variety. — Picrite, 149-1 52. 



Austria, 149. Steierdorf, Banat, 149, 150. Tnchcolm Island, Scotland, 150. 

 Herborn, Nassau, 150. EUgoth, Austria, 150, 151. Anglesey, 151. Dillgend, 

 Nassau, 151, 152. 



