Collecting and Removing Scums from Boilers - p191

doi:10.1038/scientificamerican03231872-191

PDF (553 KB)

Bridge Over the Mississippi at Brainerd, Minn—Northern Pacific Railway - p191

doi:10.1038/scientificamerican03231872-191a

PDF (553 KB)

A Navigable Balloon - p192

doi:10.1038/scientificamerican03231872-192

PDF (282 KB)

The Parkes Silver Extracting Process in Germany - pp193 - 194

doi:10.1038/scientificamerican03231872-193

PDF (635 KB)

Rotary Engines - p194

doi:10.1038/scientificamerican03231872-194

PDF (457 KB)

Hallidie's Wire Rope Way for Transporting Ores - p195

doi:10.1038/scientificamerican03231872-195

PDF (375 KB)

Precipitation of Arsenic by Heat in Marsh's Test - p195

John C. Draper, M.D

doi:10.1038/scientificamerican03231872-195a

PDF (375 KB)

Determination of High Degrees of Heat by the Melting of Ice - p195

doi:10.1038/scientificamerican03231872-195b

PDF (375 KB)

Scientific and Practical Information - p197

doi:10.1038/scientificamerican03231872-197

PDF (177 KB)

Beach's Spark Catcher and Consumer - p198

doi:10.1038/scientificamerican03231872-198

PDF (287 KB)

Himmer's Electric Battery - p198

doi:10.1038/scientificamerican03231872-198a

PDF (287 KB)

Ketchum's Pitman Connection - p198

doi:10.1038/scientificamerican03231872-198b

PDF (287 KB)

The Electro Magnetic Telegraph - p199

doi:10.1038/scientificamerican03231872-199

PDF (321 KB)

The Problem of Flight - p199

doi:10.1038/scientificamerican03231872-199a

PDF (321 KB)

Light Versus Heavy Shafting - pp199 - 200

doi:10.1038/scientificamerican03231872-199b

PDF (549 KB)

Answers to Correspondents - pp200 - 201

doi:10.1038/scientificamerican03231872-200b

PDF (503 KB)

Recent American and Foreign Patents - pp201 - 203

doi:10.1038/scientificamerican03231872-201

PDF (679 KB)