TABLE OF CONTENTS. 
VoLuUME. XIII. 
PAPERS READ BEFORE THE ACADEMY, 
PROF. J. A. ALLEN. 
PAGE. 
Direct Action of Physical Conditions as a Factor in Evolution 
(Give DUG LO) yore) iva einrstere solace ster tie tenene tor eataiiodater reer eee ales wos ea) aisle Sytieyays ol state 159 
DR. E. S. F. ARNOLD. 
Timoniteirom Ste diohn si Rivers Hlonidalsencs.15 2/5 cee sre iets 22 
AUDUBON MONUMENT COMMITTEE, 
EVE PON severe, asvercide. @ Satis Sev saeel des ovat PHOS ae RU eed odie elias Slalelens 23 
Mrensurer’s ACCOUNGS fF ./ 5 25 Fa lss/ Sata Seige ob ele ee Je hate 58 
DR. H. CARRINGTON BOLTON. 
An International Index to Chemical Literature................0005 2 
PROF. N. L. BRITTON. 
Altitudinal distribution of Eastern Plants (by title) ............... 7 
Species of the genera Dracocephalum and Cedronella (by title) ...... 98 
Our Conception of Species modified by the Doctrine of Evolution... 13 
GARY N, CALKINS. 
On the History of the Archoplasm mass in the Spermatogenesis of 
LOOSE TER Ope AS Oe os See EE te a BEE Le BeOS 135 
F. M. CHAPMAN. 
Birds and’ Mammals of Trinidad (by title) 0. ..c20. sccssceces ees 7 
PROF. A. H. CHESTER. 
Concerning another Mineral at Franklin Furnace...............--- 97 
On Caswellite, an altered Biotite from Franklin Furnace..... srstereere 181 
Quartz Crystals from: Wilenville aN 2, «5 setou/swie olde ops o's 6 a.0,0t 6 oi 181 
