Trees and Flowers in the Central Park - p208

doi:10.1038/scientificamerican04071888-208

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Position of the Planets for April - pp209 - 210

doi:10.1038/scientificamerican04071888-209

PDF (355 KB)

Hawley's Improved Railway Tie - p210

doi:10.1038/scientificamerican04071888-210

PDF (232 KB)

A Safety Attachment for Anchors - p211

doi:10.1038/scientificamerican04071888-211

PDF (278 KB)

An Improved Stacker - p211

doi:10.1038/scientificamerican04071888-211a

PDF (278 KB)

An Improved Lawn Mower - p211

doi:10.1038/scientificamerican04071888-211b

PDF (278 KB)

An Improved Step Ladder - p211

doi:10.1038/scientificamerican04071888-211c

PDF (278 KB)

An Improved Draught Equalizer - p211

doi:10.1038/scientificamerican04071888-211d

PDF (278 KB)

An Improved Trap - p212

doi:10.1038/scientificamerican04071888-212

PDF (288 KB)

An Improved Pocket Weighing Scale - p212

doi:10.1038/scientificamerican04071888-212a

PDF (288 KB)

An Improved Nut Lock - p212

doi:10.1038/scientificamerican04071888-212b

PDF (288 KB)

An Improved Sleeve Stay - p212

doi:10.1038/scientificamerican04071888-212c

PDF (288 KB)

An Improved Door Closer - p212

doi:10.1038/scientificamerican04071888-212d

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The Reed & Carnrick Food Laboratory - p213

doi:10.1038/scientificamerican04071888-213

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Some Experiments with an Electro-Magnet - p214

Geo. M Hopkins

doi:10.1038/scientificamerican04071888-214

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Spontaneous Combustion - pp214 - 215

doi:10.1038/scientificamerican04071888-214a

PDF (687 KB)

An Australian Chlamydosaurus - pp215 - 216

doi:10.1038/scientificamerican04071888-215

PDF (503 KB)

An Improved Pruning Implement - p217

doi:10.1038/scientificamerican04071888-217a

PDF (266 KB)

A Device for Operating Throttle Valves - p217

doi:10.1038/scientificamerican04071888-217b

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An Automatic Grain Weigher - p217

doi:10.1038/scientificamerican04071888-217c

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Engineering Inventions - p218

doi:10.1038/scientificamerican04071888-218

PDF (265 KB)

Agricultural Inventions - p218

doi:10.1038/scientificamerican04071888-218a

PDF (265 KB)

Miscellaneous Inventions - p218

doi:10.1038/scientificamerican04071888-218b

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Special - p218

doi:10.1038/scientificamerican04071888-218c

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To Inventors - p219

doi:10.1038/scientificamerican04071888-219a

PDF (335 KB)