PROGRAM 
9 
A New Apparatus for Regulating Temperatures] 
for Work in Polarimetry and Ref ractivity . . . j 
Electrical Conductivity of Solutions of Silver Ni-fj. N. Pearce 
trate in Water and Pyridine and in tkeirl 
Binary Mixtures. (Preliminary Paper.) J 
A Convenient Standard Cell: (Cu — Hg) — CUSO 4 — HgaSO^ — Hg. 
Dleu Ung Huong and J. N. Pearce 
Some Derivatives of 4-nitro-5-metliyl.-2-sulphobenzoic Acid 
Wm. J. Karslake and P. A. Bond 
The Anston Stone from Kiveton Park, England] 
4.n Important Building Stone from the Vosges | 
Mountains }■ Nicholas Knight 
The Transfusion of Double Salts Through Porous | 
Comparison of Some Standards in Acidimetry and Alkalimetry 
W. S. Hendrixson 
Studies on Barium Sulfate 
P. L. Bluementhal and S. C. Gurnsey, Read by Dr. Bluementhal 
A Comparison of Some Kjeldahl Methods for Nitrogen Deter- 
mination 
P. L. Bluementhal and G. P. Plaisance, Read by Mr, Plaisance 
The Ste. Genevieve Formation and Its Stratigraphic Relations in 
Southeastern Iowa Stuart Weller and Francis M, Van Tuyl 
The Occurrence and Origin of the Iron Ores of Iron Hill, Near 
Waukon, Iowa Jesse V. Howell, Introduced by G. F. Kay 
The Extension of the Wisconsin Drift Southwest' 
from Des Moines 
The Age of the Terrace Near Des Moines and 
Indianola, Iowa 
The First Coal-Washing Plant in Iowa 
The Mineral Industry in Iowa During the Past 
Decade 
The Occurrence of Barite in the Lead and Zinc 
Illinois and Wisconsin... W. D. Shipton 
A Remarkable Prairie Synclinorium 1 
Foundations of Exact Geologic Correlation.... Ioit, 1 -r^ 
Contraposed Shore-Lines on the Straits of Juan f Keyes 
du Fuca ■» 
Progress Report of Physiographic Work in the Driftless Area 
A. C. Trowbridge 
The Paleontology and Stratigraphy of the Upper Carboniferous 
of Iowa George L. Smith 
The Loess of Peczel, Hungary B. Shimek 
The Phenomenon of Leaching in Pleistocene Formations 
M. M. Leighton 
Some Unique Niagaran Cephalopods ] 
A New Crinoid Fauna from Monticello, Iowa. . . . ^ A. O. Thomas 
High Level Gravels in Floyd County, Iowa ) 
The Inheritance of Syndactylism Henry Albert 
The Effect of Alcohol on the Liver as Shown Experimentally 
A. L. Grover, Introduced by Henry Albert 
The Effect of Change of Lamp Voltage on Vision William Kunerth 
A Simple Device for Demonstrating the Tempered Scale. .L, B. Spinney 
An Attempt to Detect a Change in the Heat Conductivity of 
Selenium Crystals Under the Influence of Light L. P. Sieg 
Notes on Certain Elastic Peculiarities of Phosphor Bronze Wires 
L. P. Sieg and A. J. Oehler 
On the Wave-Length-Sensibility Curves of Isolat[d Crystals of 
Selenium Between Wave Lengths 2000 A. U. and 4500 A. U. 
F. C. Brown and L. P. Sieg 
I John L. Tilton 
I George F. Kay 
Districts of Iowa. 
