Table of Contents

July 1890; Volume s3-40,Issue 235

Vertebrate paleontology

You have access
Inconsistencies of utilitarianism as the exclusive theory of organic evolution
John T. Gulick

American Journal of Science July 1890, s3-40 (235) 1-14; DOI: https://doi.org/10.2475/ajs.s3-40.235.1

Stratigraphy

You have access
The southern extension of the Appomattox Formation
W. J. McGee

American Journal of Science July 1890, s3-40 (235) 15-41; DOI: https://doi.org/10.2475/ajs.s3-40.235.15

Applied geophysics

You have access
Experimental proof of Ohm's law; preceded by a short account of the discovery and subsequent verification of the law
A. M. Mayer

American Journal of Science July 1890, s3-40 (235) 42-50; DOI: https://doi.org/10.2475/ajs.s3-40.235.42

Igneous and metamorphic petrology

You have access
Microscope magnification
W. L. Stevens

American Journal of Science July 1890, s3-40 (235) 50-62; DOI: https://doi.org/10.2475/ajs.s3-40.235.50
You have access
Fayalite in the obsidian of Lipari
J. P. Iddings and S. L. Penfield

American Journal of Science July 1890, s3-40 (235) 75-78; DOI: https://doi.org/10.2475/ajs.s3-40.235.75

Mineralogy

You have access
Notes on the minerals occurring near Port Henry, New York
James Furman Kemp

American Journal of Science July 1890, s3-40 (235) 62-64; DOI: https://doi.org/10.2475/ajs.s3-40.235.62
You have access
On some selenium and tellurium minerals from Honduras
Edward Salisbury Dana and H. L. Wells

American Journal of Science July 1890, s3-40 (235) 78-82; DOI: https://doi.org/10.2475/ajs.s3-40.235.78

Paleobotany

You have access
Occurrence of Goniolina in the Comanche series of the Texas Cretaceous
Robert Thomas Hill

American Journal of Science July 1890, s3-40 (235) 64-65; DOI: https://doi.org/10.2475/ajs.s3-40.235.64

General geochemistry

You have access
Method for the reduction of arsenic acid in analysis
F. A. Gooch and P. E. Browning

American Journal of Science July 1890, s3-40 (235) 66-71; DOI: https://doi.org/10.2475/ajs.s3-40.235.66

Invertebrate paleontology

You have access
On the development of the shell in the genus Tornoceras Hyatt
Charles Emerson Beecher

American Journal of Science July 1890, s3-40 (235) 71-75; DOI: https://doi.org/10.2475/ajs.s3-40.235.71

Mineralogy of non-silicates

You have access
Connellite from Cornwall, England
S. L. Penfield

American Journal of Science July 1890, s3-40 (235) 82-86; DOI: https://doi.org/10.2475/ajs.s3-40.235.82