Steam-Electric Marine Propulsion
The Efficiency of a Possible System of the Future
Features
A New Method in Wet Excavation
Draining Instead of Emptying an Excavation
New Forms of Steel for New Uses
Structural Shapes Rendered Necessary by the Steel Building
The Audiffren Refrigerating Machine
The Libyan Desert Railroad
Its Far-Reaching Influence in Egypt
Darwin and after Darwin
The New Biology Outlined
The Law of the Conservation of Energy
How Mayer Discovered It
Elements of Electrical Engineering.—XXIV
Electro-Chemistry
The Respiration of an Inland Lake
What Oxygen Means to Inland Waters
