CONTENTS. 4 
R. E. DODGE. 
Cretaceous and Tertiary Peneplains of Eastern Tennessee..................-.. 143 
The Physical Geography of New York City and Neighborhood (Public 
IH ECUULE)) signa sotsis woeannnenc vie cam eameinne ae aus eceteuminee tea ce fyicevia Sve eerts caad ates 123 
P. H. DUDLEY. 
The Law of Deflection Sets Under Drop Tests in Different Séctions of 
Steel Rails of Uniform Physical Properties Follows the Compara- 
tive Moments of Inertia of the Respective Sections....................0655 147 
LIVINGSTON FARRAND. 
I EUMNTG LV EM ECA GION! ses cc sec sanses set te oses te tects ceece a eee een 155 
F. H. GIDDINGS. 
A Plan for the Systematic Study of Tribally Organized Societies.......... 154 
ARNOLD GRAF. 
The Problem of the Transmission of Acquired Characters (Abstract.)... 141 
The Structure of the Nephridial in Clepsine (Abstract )................20000 126 
N. R. HARRINGTON. 
Observations on the Lime Gland of the Earthworm (Abstract)............ 126 
E. O. HOVEY. 
The New Discoveries of Rare Minerals on Fort Washington Avenue and 
the New Speedway (Printed in the Bulletin of the Amer. Mus. Nat. 
EIS te NCL SAIN ONS LEQ) coco wcataesniasdet clade ctast senmencoaeeaeesadcemsandess 104 
GEORGE S. HUNTINGTON. 
Contributions on the Visceral Anatomy of Myrmecaphaga jubata, 
Tamandua_ bivitata, Arctopithecus didactylus, Dadypus sexecinctus, 
Tatusia novemcincta, Manis longicaudata. (Abstract)............0.0e..0+ 98 
HAROLD JACOBY. 
The Reduction of Astro-Photographic Plates. (By title)............... 2 
The Determination of Division Errors in Straight Scales. Outline and 
Historical Description of the Cape of Good Hope Observatory....... 63 
On the Reduction of Astronomical Photographs taken near the Pole of 
PHO WMCAVEMS sac secs sisisicecncn ston cies Omens Sodeadasoeeroccinasacsstacs eclsiesterieegaias 124 
On the Permanence of the Rutherfurd Photographs......................0000+ 147 
A. A. JULIEN. 
The condensed Gas Film in the Surface of Solid Bodies with relation to 
(1) Newton’s series of the first order ; (2) Sand flotation; (3) Sand 
ATNMALINO WTC) VILA BL OMey cca; sek soc cece caetaaes eum er ocas oa alaeetdne dete disidaavielee eanies 97 
