Theories of Ore-Genesis
Past and Current Views Considered
Volume 77, Issue 2007supp
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Features
Pneumatic Grain Elevators
The Ideal Method of Handling Cargoes
Expenditures of One Hundred and Eighty-four American Cities, Giant Drilling Machine for Turbine Work
The Influence of Antivivisection on Character—I
Misrepresentations, Falsehood and Passion the Characteristics of Antivivisection Propaganda
An Arithmetical Curiosity
Propelling Machinery for the Collier “Neptune”
The Reduction Gear and Dynamometer
The Use of the Pitot Tube
Filtration of Potable Waters
The Paterson Rapid System for Large Scale Operation
The Number and Light of the Stars
Is the Universe Finite ?