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To Remove Incrustations in Steam Boilers - p234
doi:10.1038/scientificamerican04101852-234c
Progress of Invention and Civilization - p237
doi:10.1038/scientificamerican04101852-237a
The American Institute and Riddle's Fair - p237
doi:10.1038/scientificamerican04101852-237h
Coffins of Baked Clay of the Chaldeans - p240
doi:10.1038/scientificamerican04101852-240b
