r A raaa 
AN IMPORTANT WORK. 
The Primary Factors of Organic Evolution. 
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ILLUSTRATIONS, 121. PAGES; 550. TABLES, BIBLIOGRAPHY AND INDEX. CLOTH, NET $2.00. 
MAIN CONTENTS. 
VARIATION, CATAGENESIS NATURAL sar mt gt 
PHYLOGENY. PH YSIOGENESIS. HEREDITY, 
PARALLELISM. KINETOGENESIS. THE OPINIONS ‘OF NEO-LAMARCKIANS. 
PRESS COMMENDATIONS. 
‘“ Will stand as the most concise and complete exposition of the doctrines of me Neo ae 
school PEARED et hed. A valuable text-book for teachers and students.”’—Prof. H. C. Williams 
Science, spotted 
“Aw eo unt i No ead the book without admiring the intimate kno po 
of f: fe ‘th wers of sponte LS ny it discloses. Tho f. J. McKeen Cattell, in Nature, London. 
te Admmirably mend ant = S -room or library. "— Boston Journa d. 
‘‘ Gathe rs up and pres t tion.’’—Boston Mornin = t 
‘A clear, straightforward ‘statement 2 po — st important pat pace upon whid h the doctrine 0 
evolution in the organic world r ory textbook of an tsap at P peaaos but e 
nected argument by a eater in his field 3 for the value of this evidence and the truth of evo olution. ie 
parses “henge the whole field, it is necessarily in main the presentation s "the facts of paleo cere Á oped 
wh 
ich the writer has chiefly "devoted his life. The is at once the most important popes pag eer = 
lic 
point of view from which the question has been approached.’’—Prof. Lester F. War d, 
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1878 1897 
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