The marseilles concrete dam
A Difficul Tengineering Feat

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A Difficul Tengineering Feat
A Gas Engine Problem and its Solution
Alternating Current Motors. Part I
Their Practical Utilization
Some New Fertilizers
The Bewildering Result of a Head-On Smash-Up
Conclusions of Engineers Concerning Practicability of The Project the Purpose of The Inventor
The Need of the Preservation of our Timber Supply
Some Personal Observation
A Reply to Dr. Alfred Russell Wallace