Volume 92, Issue 19
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Features
The International Railway Congress
The Strength of Timber Treated with Preservatives
A Visit to the Interior of the Crater of Mont Pele and a Partial Ascent of the New "Dome"
A New Type of Cow-Milking Machine
Completing the Jerome Park Reservoir
Moving Platform Subway for New York City
The Auxetophone for Reinforcing Gramophone Sounds
BY THE ENGLISH CORRESPONDENT OF THE SCIENTIFIC AMERICAN.