Ridpath's history of the world; being an account of the ethnic origin, primitive estate, early migrations, social conditions and present promise of the principal families of men .. . d transfor-mations is simple growth. The germ,or living cell, begins to increase in is the first manifestation, indeed,that the particle of matter in question isa true germ. It expands by a forceseemingly within itself; but at first with-out other modification in character. It remains under the first expansion simpleand homogeneous. The second stage of the evolution ismarked by the appearance of a strict
Ridpath's history of the world; being an account of the ethnic origin, primitive estate, early migrations, social conditions and present promise of the principal families of men .. . d transfor-mations is simple growth. The germ,or living cell, begins to increase in is the first manifestation, indeed,that the particle of matter in question isa true germ. It expands by a forceseemingly within itself; but at first with-out other modification in character. It remains under the first expansion simpleand homogeneous. The second stage of the evolution ismarked by the appearance of a stricturecorresponding to the equator of the cellby which a division begins in what mannerto be effected, and two £eB£yU£££scells produced instead of Each of the two parts assumes,in turn, the form and character of theoriginal; but the division is not com-plete, the substance of the two cells con-tinuing to flow in common under theline of stricture. Around each of thetwo lobes lines of division appear, andfour parts are produced instead of two,and these four, by division, become eight,each of which retains the exact charac-teristics of the original germ. Thus is. MANNER OF GERM DEVELOPMENT BY FISSION (SUCCESSIVE STAGESMARKED A, B, C, D). produced what is known as a cell aggre-gate, which is the first stage in the ad-vance from the germ toward completeorganic being. The question at once arises by whatmeans this first enlargement of germ lifeis effected. Whence comes Howthemate-the material which the cell j^°h°awuses in its own enlarge- gathered,ment? Certainly not out of cell has the power of has this in virtue of the life-principlewithin. It draws to itself and absorbsthe aliment whereby the increase in sizeand the other phenomena of divisionand multiplication are produced. Thematerials so gathered are not mechan-ically distributed as if they were packed 208 GREAT RACES OE MANKIND. between the parts of the living cells,but are absorb
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Keywords: ., bookcentury1800, bookdecade1890, booksub, booksubjectworldhistory
