TABLE OF CONTEKTS. 



XV 





525. "WliJit is meant by the terra Azoic, and what rocks may be included under 

 that desin;uation, 526, 527. How Fowtkr and Whitnky used the term Azoic, 

 527. The condition of things in regard to the propriety of the use of that term, 

 527. Injustice done by LouAN in liis introduction of the name Laurentian, 

 527, 528. Discussion of the question wliethcr tlie term Arehiean ought to rcphico 

 that of Azoic, 52S. Examination of the Eozoi.in question, 528-538; lirst announce- 

 ment of its existence by Lu{jan, in 1858, 528 ; Daavson, in 18()4, announces 

 that it belongs to the Uluzopods, and tliat its discovery will be " one of the bright- 

 est gems in the scieutiQc crown of the Geological Survey of Canada.," 529; furtlicr 

 investigation of thu EozoiJn by Caupknteu, and its recognition by him as a 

 Foranimifer, 529; his authority insures its gen(!ral recognition as the earliest 

 known representative of life, 529; opposition, however, begins to manifest itself, 

 529; gradual accumulation of an eozoonal literature, but general acceptance of 

 the Eozoon Canadcnse, 530 ; dilhcrdty in tlio way of proving that it was not 

 organic, 53,0 ; Iiow Jldiiius overcame this difllculty, 530, 531 ; his results, 

 and tlie characterization of tlieni by Zittel and F. IvOEMKu, 631; Leidy'h views, 

 531; our own investigations into the character of the " Eozoonal limestones " of 

 Eastern Massachusetts, 532-534. Prevalent tendency among paheontoh^gists, at 

 the present time, to lind traces of organic life in all kinds of rocks, such as 

 granite, lava, and even in slag — tliis accounted for, 534. Some evidence in re- 

 ard to the ability of Cahpenteu and Dawson to distinguisli minerals from 

 fossils, 534-537. Extraordijuiry discoveries of Otto IIaiin, and their bearing 

 on the Kozoon (piestion, 537, 538. Question discussed whether the existence of 

 limestone and graphite is a proof of the presence of life at the time of their forma- 

 tion, 538-544. Biscuof's views in regard to the existence of carbon during the 

 primeval epoch, 538 ; his evidence controverted, 538-543; gniphite in cast-iron, 

 538; in the crystalline rocks, 539; not formed as coal luis lieen, 540; phnuliago 

 not always gra[)hite, 540; the artiiieial production of graphite, and of tluMlia- 

 mond, 540 ; graphite formed in tlic he lilanc process, 541; JiistnioF's ideas in 

 regard to the nmde of occurrence of tlie diamond ^siiown to be incorrect, 541, 

 542; how it does oeeui-, in connection witli gohl, 512; in South Africa, in vob 

 canic roidvs, 542, 543; some facts in rcganl to the peculiar circumstances uiuler 

 which the dvanmnd umst have bctai formed, 543. Examination of the (airrcnt 

 idea that the presenic of carbonate of lime is proof of tlie existence of life at the 

 time tins was fornuHl, 543, 544. Shnilar imputy in jvgard to iron, 544 ; in 

 regard to sulphur, 544, 545; phosphoric acid, 545. No encouragement given, 

 by the investigations of the past half-ccntuiy, to the idea that below the 

 Primordial or Potsdam zone there is another scries of fossilifcrous rocks, 545. 

 The wisli father to the thought, 545, 540; Lyell "revels wltli delight" 

 {JJde J\lurchison) at the discovery of the Kozoiin, 545. DilUeulty in which evo- 

 lutionists are iilaceii by its adoption, 540 ; E. JioiGMKu's statement of the ease 

 recommended for considcratimi, 54G. llemarkable result of pahcontological 

 investigations— one and ihc ,sauu^ fauna over the whole globi; (Uning the Pri- 

 nmrdial epoch, 546. lid'creiices with regard to the iizoic character of tlie Azoic 

 series, 546. Tmpury into Dana's use of his term Archiiian, 547-550; he includes 

 under that dcsignjition rocks of diQ'crent ages, both fossiliierous and non- 

 fossiUf(U'ous, 547 ; the importance of recognizing in our nomenclature the epoch 

 of the first iutroducniou of life upon the globe, 547. DaN/V believes that a part 



